TY 2024 Form 990

- TIN:

Form990

Department of the TreasuryInternal Revenue Service

Return of Organization Exempt From Income Tax

Under section 501(c), 527, or 4947(a)(1) of the Internal Revenue Code (except private foundations)

Do not enter social security numbers on this form as it may be made public.

Go to www.irs.gov/Form990 for instructions and the latest information.

OMB No. 1545-0047

2024

Open to Public Inspection

A For the 2024 calendar year, or tax year beginning 01-01-2024 , and ending 12-31-2024

BCheck if applicable: Address change Name change Initial return Final return/terminated Amended return Application pending

CName of organization
INFECTIOUS DISEASES SOCIETY OF AMERICA

Doing business as
IDSA

Number and street (or P.O. box if mail is not delivered to street address)
4040 WILSON BOULEVARD 300

Room/suite

City or town, state or province, country, and ZIP or foreign postal code
ARLINGTON, VA22203

D Employer identification number

23-7045686

E Telephone number

G Gross receipts $ 32,259,941

F Name and address of principal officer:
CHRISTOPHER BUSKY
4040 WILSON BOULEVARD 300
ARLINGTON,VA22203

Tax-exempt status: 501(c)(3) 501(c) ( 6 ) (insert no.) 4947(a)(1) or 527

Website:

WWW.IDSOCIETY.ORG

H(a)

Is this a group return for
subordinates? Yes No

H(b)

Are all subordinates
included?

Yes No

If "No," attach a list. See instructions.

H(c)

Group exemption number

K Form of organization: Corporation Trust Association Other

L Year of formation: 1970

M State of legal domicile: DC

Part I

Summary

1	Briefly describe the organization’s mission or most significant activities: IMPROVE THE HEALTH OF SOCIETY BY PROMOTING EXCELLENCE IN PATIENT CARE, EDUCATION, RESEARCH, PUBLIC HEALTH AND PREVENTION OF INFECTIOUS DISEASES.
2	Check this box
3	Number of voting members of the governing body (Part VI, line 1a) ........	3	15
4	Number of independent voting members of the governing body (Part VI, line 1b) .....	4	15
5	Total number of individuals employed in calendar year 2024 (Part V, line 2a) ......	5	120
6	Total number of volunteers (estimate if necessary) .............	6	700
7a	Total unrelated business revenue from Part VIII, column (C), line 12 ........	7a	69,463
b	Net unrelated business taxable income from Form 990-T, Part I, line 11 .........	7b	30,200

		Prior Year	Current Year
8	Contributions and grants (Part VIII, line 1h) .........	3,445,085	1,416,910
9	Program service revenue (Part VIII, line 2g) .........	31,529,250	28,617,663
10	Investment income (Part VIII, column (A), lines 3, 4, and 7d ) ....	2,006,939	1,475,671
11	Other revenue (Part VIII, column (A), lines 5, 6d, 8c, 9c, 10c, and 11e)	636,964	749,697
12	Total revenue—add lines 8 through 11 (must equal Part VIII, column (A), line 12)	37,618,238	32,259,941
13	Grants and similar amounts paid (Part IX, column (A), lines 1–3 )...	951,405	1,060,246
14	Benefits paid to or for members (Part IX, column (A), line 4).....	0	0
15	Salaries, other compensation, employee benefits (Part IX, column (A), lines 5–10)	14,655,026	15,558,551
16a	Professional fundraising fees (Part IX, column (A), line 11e) .....	0	0
b	Total fundraising expenses (Part IX, column (D), line 25) 0
17	Other expenses (Part IX, column (A), lines 11a–11d, 11f–24e)....	21,857,467	22,902,394
18	Total expenses. Add lines 13–17 (must equal Part IX, column (A), line 25)	37,463,898	39,521,191
19	Revenue less expenses. Subtract line 18 from line 12.......	154,340	-7,261,250
		Beginning of Current Year	End of Year
20	Total assets (Part X, line 16).............	68,105,366	66,284,980
21	Total liabilities (Part X, line 26).............	16,278,116	17,232,049
22	Net assets or fund balances. Subtract line 21 from line 20.....	51,827,250	49,052,931

Part II

Signature Block

Under penalties of perjury, I declare that I have examined this return, including accompanying schedules and statements, and to the best of my knowledge and belief, it is true, correct, and complete. Declaration of preparer (other than officer) is based on all information of which preparer has any knowledge.

Sign Here

	Signature of officer	Date

	Type or print name and title

Paid Preparer Use Only

Print/Type preparer's name

Preparer's signature

Date

Check if
self-employed

PTIN

Firm's name

Firm's EIN

Firm's address

Phone no.

May the IRS discuss this return with the preparer shown above? See Instructions. ..........YesNo

For Paperwork Reduction Act Notice, see the separate instructions.

Cat. No. 11282Y Form 990 (2024)

Form 990 (2024)

Page 2

Part III

Statement of Program Service Accomplishments

Check if Schedule O contains a response or note to any line in this Part III..............

Briefly describe the organization’s mission: THE MISSION OF THE INFECTIOUS DISEASES SOCIETY OF AMERICA (IDSA) IS TO IMPROVE THE HEALTH OF INDIVIDUALS, COMMUNITIES, AND SOCIETY BY PROMOTING EXCELLENCE IN PATIENT CARE, EDUCATION, RESEARCH, PUBLIC HEALTH, AND PREVENTION OF INFECTIOUS DISEASES. IDSA'S WORK IS GUIDED BY A COMMITMENT TO SCIENCE, HEALTH EQUITY, AND TACKLING THE CHALLENGES OF INFECTIOUS DISEASES THROUGH ITS GLOBAL COMMUNITY OF EXPERTS.

Did the organization undertake any significant program services during the year which were not listed on
the prior Form 990 or 990-EZ? ..................... Yes No

If "Yes," describe these new services on Schedule O.

Did the organization cease conducting, or make significant changes in how it conducts, any program
services? ........................... Yes No

If "Yes," describe these changes on Schedule O.

Describe the organization’s program service accomplishments for each of its three largest program services, as measured by expenses. Section 501(c)(3) and 501(c)(4) organizations are required to report the amount of grants and allocations to others, the total expenses, and revenue, if any, for each program service reported.


4a	(Code: ) (Expenses $ including grants of $ ) (Revenue $ )
	IDWEEK ANNUAL CONFERENCE - IDWEEK 2024 IN LOS ANGELES, CA, ATTRACTED MORE THAN 10,000 ATTENDEES. THE MEETING IS THE WORLD'S PREMIER INFECTIOUS DISEASES EVENT. IDWEEK PROVIDES AN OPPORTUNITY FOR HEALTH PROFESSIONALS OF VARIED BACKGROUNDS TO LEARN FROM EACH OTHER'S KNOWLEDGE, EXPERIENCE AND EXPERTISE, FOR THE IMPROVEMENT OF PATIENT CARE AND PUBLIC HEALTH. THIS IS AN INCLUSIVE MEETING THAT OFFERS ACCESS TO INTERNATIONALLY RECOGNIZED LEADERS IN THE FIELD AND THE OPPORTUNITY TO NETWORK WITH THE MOST HIGHLY RESPECTED HEALTH PROFESSIONALS IN INFECTIOUS DISEASES, INCLUDING HIV.

4b	(Code: ) (Expenses $ including grants of $ ) (Revenue $ )
	CLINICAL INFECTIOUS DISEASES (CID), THE JOURNAL OF INFECTIOUS DISEASES (JID) AND OPEN FORUM INFECTIOUS DISEASES (OFID) ARE SCHOLARLY JOURNALS PUBLISHED BY IDSA IN PARTNERSHIP WITH AN OUTSIDE PUBLISHER TO DISSEMINATE THE LATEST RESEARCH ON A VARIETY OF TOPICS IN THE FIELD TO MEMBERS AND SUBSCRIBERS. CID PUBLISHES ORIGINAL RESEARCH, REVIEWS AND PERSPECTIVES THAT ALL CLINICIANS CAN USE WHEN CARING FOR PATIENTS. CID COVERS THE CLINICAL PRESENTATION, DIAGNOSIS, TREATMENT AND PREVENTION OF THE FULL RANGE OF INFECTIOUS DISEASES. THE EVALUATION OF CURRENT AND NOVEL TREATMENTS, MICROBIOLOGY, IMMUNOLOGY AND POLICIES AS THEY RELATE TO PATIENT CARE ARE HIGHLY PRIORITIZED. PUBLISHED CONTINUOUSLY SINCE 1904, JID IS THE PREMIER GLOBAL JOURNAL FOR TRANSLATIONAL INFECTIOUS DISEASES SCIENCE. THE EDITORS WELCOME MAJOR ARTICLES AND BRIEF REPORTS DESCRIBING RESEARCH RESULTS ON MICROBIOLOGY, IMMUNOLOGY, EPIDEMIOLOGY, AND RELATED DISCIPLINES, ON THE PATHOGENESIS, DIAGNOSIS, AND TREATMENT OF INFECTIOUS DISEASES; ON THE MICROBES THAT CAUSE THEM; AND ON DISORDERS OF HOST IMMUNE RESPONSES. OFID PUBLISHES CLINICAL, TRANSLATIONAL AND BASIC RESEARCH IN A FULLY OPEN ACCESS, ONLINE JOURNAL. IT FOCUSES ON THE INTERSECTION OF BIOMEDICAL SCIENCE AND CLINICAL PRACTICE, WITH AN EMPHASIS ON KNOWLEDGE THAT COULD IMPROVE PATIENT CARE GLOBALLY. ARTICLES ARE WRITTEN BY EXPERTS IN THE FIELD, INCLUDING MEMBERS AND NON-MEMBERS, AND REVIEWED BY A PANEL OF LEADING MEDICAL EXPERTS BEFORE THEY ARE PUBLISHED.

4c	(Code: ) (Expenses $ including grants of $ ) (Revenue $ )
	MEMBER SERVICES - IDSA MEMBER SERVICES PROVIDES TIMELY SCIENTIFIC INFORMATION, RELEVANT PUBLIC POLICY AND REGULATION, AND CAREER DEVELOPMENT RESOURCES.

	(Code: ) (Expenses $ including grants of $ ) (Revenue $ )
	IDSA WAS AWARDED A COOPERATIVE AGREEMENT TO SUPPORT THE CDC BY PROVIDING RESOURCES TO FRONTLINE HEALTH CARE PROFESSIONALS CARING FOR PATIENTS WITH COVID-19. THE PARTNERSHIP BRINGS NUMEROUS MEDICAL SPECIALTIES TOGETHER TO SHARE RESOURCES AND TO PROVIDE THE LATEST INFORMATION AND GUIDANCE ON TREATING THOSE INFECTED WITH COVID-19 AND PREVENTING ITS SPREAD. THROUGH FUNDING FROM CDC, IDSA EXPERTS SUPPORT CDC'S CLINICAL CALL LINES, PROVIDING GUIDANCE TO HEALTH CARE PROVIDERS TREATING COVID-19 PATIENTS. THE COLLABORATION HAS ALSO FUNDED THE FLOURISHING COVID-19 REAL-TIME LEARNING NETWORK, AN ONLINE CENTER FOR FRONTLINE CLINICIANS TO LEARN, COLLABORATE AND SHARE TREATMENT BEST PRACTICES. IDSA'S COVID-19 PRACTICE GUIDELINES ON DIAGNOSTICS, TREATMENT AND MANAGEMENT ALSO RECEIVE FUNDING THROUGH THE GRANT. ADDITIONALLY, UNDER THE PARTNERSHIP, TWICE-MONTHLY CLINICIAN TELECONFERENCES PROVIDE HEALTH CARE PROFESSIONALS ACCESS TO EXPERTS WITH THE LATEST INFORMATION ON THIS EVOLVING VIRUS AS WELL AS AN OPPORTUNITY TO ASK QUESTIONS. THE CALLS FREQUENTLY DRAW MORE THAN 800 ATTENDEES.

4d	Other program services (Describe in Schedule O.)
	(Expenses $ including grants of $ ) (Revenue $ )
4e	Total program service expenses

Form 990 (2024)

Page 3

Part IV

Checklist of Required Schedules

Yes

Is the organization described in section 501(c)(3) or 4947(a)(1) (other than a private foundation)? If "Yes," complete Schedule A.....................

Is the organization required to complete Schedule B, Schedule of Contributors? See instructions. Click to see attachment

List of Attached Documents:

// Content

...

Yes

Did the organization engage in direct or indirect political campaign activities on behalf of or in opposition to candidates for public office? If "Yes," complete Schedule C, Part I Click to see attachment

List of Attached Documents:

// Content

.............

Section 501(c)(3) organizations. Did the organization engage in lobbying activities, or have a section 501(h) election in effect during the tax year? If "Yes," complete Schedule C, Part II.........

Is the organization a section 501(c)(4), 501(c)(5), or 501(c)(6) organization that receives membership dues, assessments, or similar amounts as defined in Rev. Proc. 98-19? If "Yes," complete Schedule C, Part III Click to see attachment

List of Attached Documents:

// Content

Yes

Did the organization maintain any donor advised funds or any similar funds or accounts for which donors have the right to provide advice on the distribution or investment of amounts in such funds or accounts? If "Yes," complete Schedule D, Part I Click to see attachment

List of Attached Documents:

// Content

.........................

Did the organization receive or hold a conservation easement, including easements to preserve open space,
the environment, historic land areas, or historic structures? If "Yes," complete Schedule D, Part II Click to see attachment

List of Attached Documents:

// Content

....

Did the organization maintain collections of works of art, historical treasures, or other similar assets? If "Yes,"
complete Schedule D, Part III Click to see attachment

List of Attached Documents:

// Content

..............

Did the organization report an amount in Part X, line 21 for escrow or custodial account liability; serve as a custodian for amounts not listed in Part X; or provide credit counseling, debt management, credit repair, or debt negotiation services? If "Yes," complete Schedule D, Part IV Click to see attachment

List of Attached Documents:

// Content

..............

Did the organization, directly or through a related organization, hold assets in temporarily restricted endowments, permanent endowments, or quasi endowments? If "Yes," complete Schedule D, Part V......

If the organization’s answer to any of the following questions is "Yes," then complete Schedule D, Parts VI, VII, VIII, IX, or X, as applicable.

Did the organization report an amount for land, buildings, and equipment in Part X, line 10? If "Yes," complete
Schedule D, Part VI. Click to see attachment

List of Attached Documents:

// Content

...................

11a

Yes

Did the organization report an amount for investments—other securities in Part X, line 12 that is 5% or more of its total assets reported in Part X, line 16? If "Yes," complete Schedule D, Part VII Click to see attachment

List of Attached Documents:

// Content

.......

11b

Yes

Did the organization report an amount for investments—program related in Part X, line 13 that is 5% or more of its total assets reported in Part X, line 16? If "Yes," complete Schedule D, Part VIII Click to see attachment

List of Attached Documents:

// Content

.......

11c

Did the organization report an amount for other assets in Part X, line 15 that is 5% or more of its total assets reported in Part X, line 16? If "Yes," complete Schedule D, Part IX Click to see attachment

List of Attached Documents:

// Content

............

11d

Yes

Did the organization report an amount for other liabilities in Part X, line 25? If "Yes," complete Schedule D, Part X Click to see attachment

List of Attached Documents:

// Content

11e

Yes

Did the organization’s separate or consolidated financial statements for the tax year include a footnote that addresses the organization’s liability for uncertain tax positions under FIN 48 (ASC 740)? If "Yes," complete Schedule D, Part X Click to see attachment

List of Attached Documents:

// Content

11f

12a

Did the organization obtain separate, independent audited financial statements for the tax year? If "Yes," complete
Schedule D, Parts XI and XII Click to see attachment

List of Attached Documents:

// Content

......................

12a

Was the organization included in consolidated, independent audited financial statements for the tax year? If "Yes," and if the organization answered "No" to line 12a, then completing Schedule D, Parts XI and XII is optional Click to see attachment

List of Attached Documents:

// Content

12b

Yes

Is the organization a school described in section 170(b)(1)(A)(ii)? If "Yes," complete Schedule E

14a

Did the organization maintain an office, employees, or agents outside of the United States? .....

14a

Did the organization have aggregate revenues or expenses of more than $10,000 from grantmaking, fundraising, business, investment, and program service activities outside the United States, or aggregate foreign investments valued at $100,000 or more? If "Yes," complete Schedule F, Parts I and IV......... Click to see attachment

List of Attached Documents:

// Content

14b

Yes

Did the organization report on Part IX, column (A), line 3, more than $5,000 of grants or other assistance to or for any foreign organization? If “Yes,” complete Schedule F, Parts II and IV..... Click to see attachment

List of Attached Documents:

// Content

Did the organization report on Part IX, column (A), line 3, more than $5,000 of aggregate grants or other assistance to or for foreign individuals? If “Yes,” complete Schedule F, Parts III and IV... Click to see attachment

List of Attached Documents:

// Content

Yes

Did the organization report a total of more than $15,000 of expenses for professional fundraising services on Part IX, column (A), lines 6 and 11e? If "Yes," complete Schedule G, Part I. See instructions. ....

Did the organization report more than $15,000 total of fundraising event gross income and contributions on Part VIII, lines 1c and 8a? If "Yes," complete Schedule G, Part II............

Did the organization report more than $15,000 of gross income from gaming activities on Part VIII, line 9a? If "Yes," complete Schedule G, Part III...................

20a

Did the organization operate one or more hospital facilities? If "Yes," complete Schedule H....

20a

If "Yes" to line 20a, did the organization attach a copy of its audited financial statements to this return?

20b

Did the organization report more than $5,000 of grants or other assistance to any domestic organization or domestic government on Part IX, column (A), line 1? If “Yes,” complete Schedule I, Parts I and II..... Click to see attachment

List of Attached Documents:

// Content

Yes

Form 990 (2024)

Page 4

Part IV

Checklist of Required Schedules (continued)

Yes

Did the organization report more than $5,000 of grants or other assistance to or for domestic individuals on Part IX, column (A), line 2? If “Yes,” complete Schedule I, Parts I and III........ Click to see attachment

List of Attached Documents:

// Content

Yes

Did the organization answer "Yes" to Part VII, Section A, line 3, 4, or 5, about compensation of the organization’s current and former officers, directors, trustees, key employees, and highest compensated employees? If "Yes," complete Schedule J....................... Click to see attachment

List of Attached Documents:

// Content

Yes

24a

Did the organization have a tax-exempt bond issue with an outstanding principal amount of more than $100,000 as of the last day of the year, that was issued after December 31, 2002? If “Yes,” answer lines 24b through 24d and complete Schedule K. If “No,” go to line 25a...............

24a

Did the organization invest any proceeds of tax-exempt bonds beyond a temporary period exception?...

24b

Did the organization maintain an escrow account other than a refunding escrow at any time during the year
to defease any tax-exempt bonds? ...............

24c

Did the organization act as an "on behalf of" issuer for bonds outstanding at any time during the year?...

24d

25a

Section 501(c)(3), 501(c)(4), and 501(c)(29) organizations. Did the organization engage in an excess benefit transaction with a disqualified person during the year? If "Yes," complete Schedule L, Part I ....

25a

Is the organization aware that it engaged in an excess benefit transaction with a disqualified person in a prior year, and that the transaction has not been reported on any of the organization’s prior Forms 990 or 990-EZ? If "Yes," complete Schedule L, Part I.......................

25b

Did the organization report any amount on Part X, line 5 or 22 for receivables from or payables to any current or former officer, director, trustee, key employee, creator or founder, substantial contributor, or 35% controlled entity or family member of any of these persons? If "Yes," complete Schedule L, Part II...........

Did the organization provide a grant or other assistance to any current or former officer, director, trustee, key employee, creator or founder, substantial contributor, or employee thereof, a grant selection committee member, or to a 35% controlled entity (including an employee thereof) or family member of any of these persons?

If "Yes," complete

Schedule L, Part III.........................

Was the organization a party to a business transaction with one of the following parties (see the Schedule L, Part IV instructions for applicable filing thresholds, conditions, and exceptions):

A current or former officer, director, trustee, key employee, creator or founder, or substantial contributor? If "Yes," complete Schedule L, Part IV......................

28a

A family member of any individual described in line 28a? If "Yes," complete Schedule L, Part IV.....

28b

A 35% controlled entity of one or more individuals and/or organizations described in line 28a or 28b? If "Yes," complete Schedule L, Part IV.....................

28c

Did the organization receive more than $25,000 in non-cash contributions? If "Yes," complete Schedule M..

Did the organization receive contributions of art, historical treasures, or other similar assets, or qualified conservation contributions? If "Yes," complete Schedule M .................

Did the organization liquidate, terminate, or dissolve and cease operations? If "Yes," complete Schedule N, Part I

Did the organization sell, exchange, dispose of, or transfer more than 25% of its net assets? If "Yes," complete Schedule N, Part II........................

Did the organization own 100% of an entity disregarded as separate from the organization under Regulations sections 301.7701-2 and 301.7701-3? If "Yes," complete Schedule R, Part I............ Click to see attachment

List of Attached Documents:

// Content

Was the organization related to any tax-exempt or taxable entity? If "Yes," complete Schedule R, Part II, III, or IV, and Part V, line 1......................... Click to see attachment

List of Attached Documents:

// Content

Yes

35a

Did the organization have a controlled entity within the meaning of section 512(b)(13)?

35a

Yes

If ‘Yes’ to line 35a, did the organization receive any payment from or engage in any transaction with a controlled entity within the meaning of section 512(b)(13)? If "Yes," complete Schedule R, Part V, line 2 ... Click to see attachment

List of Attached Documents:

// Content

35b

Section 501(c)(3) organizations. Did the organization make any transfers to an exempt non-charitable related organization? If "Yes," complete Schedule R, Part V, line 2.............

Did the organization conduct more than 5% of its activities through an entity that is not a related organization and that is treated as a partnership for federal income tax purposes? If "Yes," complete Schedule R, Part VI Click to see attachment

List of Attached Documents:

// Content

Did the organization complete Schedule O and provide explanations on Schedule O for Part VI, lines 11b and 19? Note. All Form 990 filers are required to complete Schedule O. ............

Yes

Part V

Statements Regarding Other IRS Filings and Tax Compliance
Check if Schedule O contains a response or note to any line in this Part V...........

Yes

Enter the number reported in box 3 of Form 1096. Enter -0- if not applicable ..

177

Enter the number of Forms W-2G included on line 1a. Enter -0- if not applicable .

Did the organization comply with backup withholding rules for reportable payments to vendors and reportable gaming (gambling) winnings to prize winners? ..................

Yes

Form 990 (2024)

Page 5

Part V

Statements Regarding Other IRS Filings and Tax Compliance (continued)

Enter the number of employees reported on Form W-3, Transmittal of Wage and
Tax Statements, filed for the calendar year ending with or within the year covered by this return ..................

120

If at least one is reported on line 2a, did the organization file all required federal employment tax returns?

Did the organization have unrelated business gross income of $1,000 or more during the year?...

Yes

If “Yes,” has it filed a Form 990-T for this year? If “No” to line 3b, provide an explanation in Schedule O...

Yes

At any time during the calendar year, did the organization have an interest in, or a signature or other authority over, a financial account in a foreign country (such as a bank account, securities account, or other financial account)? ..

If "Yes," enter the name of the foreign country:
See instructions for filing requirements for FinCEN Form 114, Report of Foreign Bank and Financial Accounts (FBAR).

Was the organization a party to a prohibited tax shelter transaction at any time during the tax year? ..

Did any taxable party notify the organization that it was or is a party to a prohibited tax shelter transaction?

If "Yes," to line 5a or 5b, did the organization file Form 8886-T? ............

Does the organization have annual gross receipts that are normally greater than $100,000, and did the organization solicit any contributions that were not tax deductible as charitable contributions? ...

Yes

If "Yes," did the organization include with every solicitation an express statement that such contributions or gifts were not tax deductible? ......................

Yes

Organizations that may receive deductible contributions under section 170(c).

Did the organization receive a payment in excess of $75 made partly as a contribution and partly for goods and services provided to the payor? ....................

If "Yes," did the organization notify the donor of the value of the goods or services provided? .....

Did the organization sell, exchange, or otherwise dispose of tangible personal property for which it was required to file Form 8282? .........................

If "Yes," indicate the number of Forms 8282 filed during the year ....

Did the organization receive any funds, directly or indirectly, to pay premiums on a personal benefit contract?

Did the organization, during the year, pay premiums, directly or indirectly, on a personal benefit contract? ..

If the organization received a contribution of qualified intellectual property, did the organization file Form 8899 as required? ......................

If the organization received a contribution of cars, boats, airplanes, or other vehicles, did the organization file a Form 1098-C? ..........................

Sponsoring organizations maintaining donor advised funds. Did a donor advised fund maintained by the sponsoring organization have excess business holdings at any time during the year? ........

Sponsoring organizations maintaining donor advised funds.

Did the sponsoring organization make any taxable distributions under section 4966?........

Did the sponsoring organization make a distribution to a donor, donor advisor, or related person?...

Section 501(c)(7) organizations. Enter:

Initiation fees and capital contributions included on Part VIII, line 12 ...

10a

Gross receipts, included on Form 990, Part VIII, line 12, for public use of club facilities

10b

Section 501(c)(12) organizations. Enter:

Gross income from members or shareholders .........

11a

Gross income from other sources. (Do not net amounts due or paid to other sources against amounts due or received from them.) ..........

11b

12a

Section 4947(a)(1) non-exempt charitable trusts. Is the organization filing Form 990 in lieu of Form 1041?

12a

If "Yes," enter the amount of tax-exempt interest received or accrued during the year.

12b

Section 501(c)(29) qualified nonprofit health insurance issuers.

Is the organization licensed to issue qualified health plans in more than one state? .........
Note. See the instructions for additional information the organization must report on Schedule O.

13a

Enter the amount of reserves the organization is required to maintain by the states in which the organization is licensed to issue qualified health plans ....

13b

Enter the amount of reserves on hand ............

13c

14a

Did the organization receive any payments for indoor tanning services during the tax year?.....

14a

If "Yes," has it filed a Form 720 to report these payments? If "No," provide an explanation in Schedule O..

14b

Is the organization subject to the section 4960 tax on payment(s) of more than $1,000,000 in remuneration or excess parachute payment(s) during the year? ....................
If "Yes," see the instructions and file Form 4720, Schedule N.

Is the organization an educational institution subject to the section 4968 excise tax on net investment income? ..
If "Yes," complete Form 4720, Schedule O.

Section 501(c)(21) organizations. Did the trust, or any disqualified or other person engage in any activities that would result in the imposition of an excise tax under section 4951, 4952, or 4953? ..
If "Yes," complete Form 6069.

Form 990 (2024)

Page 6

Part VI

Governance, Management, and Disclosure. For each "Yes" response to lines 2 through 7b below, and for a "No" response to lines 8a, 8b, or 10b below, describe the circumstances, processes, or changes in Schedule O. See instructions.

Check if Schedule O contains a response or note to any line in this Part VI..............

Section A. Governing Body and Management

Yes

Enter the number of voting members of the governing body at the end of the tax year

If there are material differences in voting rights among members of the governing body, or if the governing body delegated broad authority to an executive committee or similar committee, explain in Schedule O.

Enter the number of voting members included in line 1a, above, who are independent

Did any officer, director, trustee, or key employee have a family relationship or a business relationship with any other officer, director, trustee, or key employee? .................

Did the organization delegate control over management duties customarily performed by or under the direct supervision of officers, directors or trustees, or key employees to a management company or other person? .

Did the organization make any significant changes to its governing documents since the prior Form 990 was filed? .

Did the organization become aware during the year of a significant diversion of the organization’s assets? .

Did the organization have members or stockholders? ................

Yes

Did the organization have members, stockholders, or other persons who had the power to elect or appoint one or more members of the governing body? ....................

Yes

Are any governance decisions of the organization reserved to (or subject to approval by) members, stockholders, or persons other than the governing body? ...................

Yes

Did the organization contemporaneously document the meetings held or written actions undertaken during the year by the following:

The governing body? .......................

Yes

Each committee with authority to act on behalf of the governing body? ............

Yes

Is there any officer, director, trustee, or key employee listed in Part VII, Section A, who cannot be reached at the organization’s mailing address? If "Yes," provide the names and addresses in Schedule O.......

Section B. Policies (This Section B requests information about policies not required by the Internal Revenue Code.)

Yes

10a

Did the organization have local chapters, branches, or affiliates? ............

10a

If "Yes," did the organization have written policies and procedures governing the activities of such chapters, affiliates, and branches to ensure their operations are consistent with the organization's exempt purposes?

10b

11a

Has the organization provided a complete copy of this Form 990 to all members of its governing body before filing the form? ............................

11a

Yes

Describe on Schedule O the process, if any, used by the organization to review this Form 990. .....

12a

Did the organization have a written conflict of interest policy? If "No," go to line 13.......

12a

Yes

Were officers, directors, or trustees, and key employees required to disclose annually interests that could give rise to conflicts? ..........................

12b

Yes

Did the organization regularly and consistently monitor and enforce compliance with the policy? If "Yes," describe on Schedule O how this was done...................

12c

Yes

Did the organization have a written whistleblower policy? ...............

Yes

Did the organization have a written document retention and destruction policy? .........

Yes

Did the process for determining compensation of the following persons include a review and approval by independent persons, comparability data, and contemporaneous substantiation of the deliberation and decision?

The organization’s CEO, Executive Director, or top management official ...........

15a

Yes

Other officers or key employees of the organization ................

15b

If "Yes" to line 15a or 15b, describe the process on Schedule O. See instructions.

16a

Did the organization invest in, contribute assets to, or participate in a joint venture or similar arrangement with a taxable entity during the year? ......................

16a

If "Yes," did the organization follow a written policy or procedure requiring the organization to evaluate its participation in joint venture arrangements under applicable federal tax law, and take steps to safeguard the organization’s exempt status with respect to such arrangements? ............

16b

Section C. Disclosure

List the states with which a copy of this Form 990 is required to be filed

Section 6104 requires an organization to make its Form 1023 (1024 or 1024-A, if applicable), 990, and 990-T (section 501(c)(3)s only) available for public inspection. Indicate how you made these available. Check all that apply.

Own website Another's website Upon request Other (explain in Schedule O)

Describe in Schedule O whether (and if so, how) the organization made its governing documents, conflict of interest policy, and financial statements available to the public during the tax year.

State the name, address, and telephone number of the person who possesses the organization's books and records:
BARTON GROH VP FINANCE & ADMIN4040 WILSON BLVD NO 300 ARLINGTON,VA22203 (703) 299-0200

Form 990 (2024)

Page 7

Part VII

Compensation of Officers, Directors,Trustees, Key Employees, Highest Compensated Employees, and Independent Contractors

Check if Schedule O contains a response or note to any line in this Part VII..............

Section A. Officers, Directors, Trustees, Key Employees, and Highest Compensated Employees

1a Complete this table for all persons required to be listed. Report compensation for the calendar year ending with or within the organization’s tax year.
RoundBullet

List all of the organization’s current officers, directors, trustees (whether individuals or organizations), regardless of amount
of compensation. Enter -0- in columns (D), (E), and (F) if no compensation was paid.

List all of the organization’s current key employees, if any. See the instructions for definition of "key employee."

List the organization’s five current highest compensated employees (other than an officer, director, trustee or key employee)
who received reportable compensation (box 5 of Form W-2, box 6 of Form 1099-MISC, and/or box 1 of Form 1099-NEC) of more than $100,000 from the organization and any related organizations.

List all of the organization’s former officers, key employees, or highest compensated employees who received more than $100,000
of reportable compensation from the organization and any related organizations.

List all of the organization’s former directors or trustees that received, in the capacity as a former director or trustee of the
organization, more than $10,000 of reportable compensation from the organization and any related organizations.

See the instructions for the order in which to list the persons above.

Check this box if neither the organization nor any related organization compensated any current officer, director, or trustee.

(A) Name and title	(B) Average hours per week (list any hours for related organizations below dotted line)	(C) Position (do not check more than one box, unless person is both an officer and a director/trustee)				(D) Reportable compensation from the organization (W-2/1099-MISC/1099-NEC)	(E) Reportable compensation from related organizations (W-2/1099-MISC/1099-NEC)	(F) Estimated amount of other compensation from the organization and related organizations
(A) Name and title
(1) CHRISTOPHER BUSKY CAE...................................................................... CHIEF EXECUTIVE OFFICER	32.50 ................. 5.00		X			711,141	15,664	86,330
(2) TY JOHNSON...................................................................... CHIEF OPERATING OFFICER	22.50 ................. 15.00		X			326,268	104,406	39,915
(3) DANA WOLLINS...................................................................... SVP, STRATEGY	37.50 ................. 0.00			X		284,741	0	59,916
(4) AMANDA JEZEK...................................................................... SVP, POLICY & GOVERNMENT RELATIONS	37.50 ................. 0.00			X		273,303	0	56,806
(5) SANDRA VURA HARWOOD...................................................................... VP, MEETINGS & EDUCATION	37.50 ................. 0.00			X		262,084	0	44,668
(6) FELICITY CLANCY...................................................................... VP, MARKETING & MEMBERSHIP	37.50 ................. 0.00				X	242,469	0	55,197
(7) ANDREA WEDDLE...................................................................... ED, HIVMA	36.50 ................. 1.00			X		239,037	6,374	33,546
(8) SALANDRA THOMAS...................................................................... VP, TALENT & ORG. DEVELOPMENT	34.50 ................. 3.00				X	228,380	6,090	46,179
(9) BARTON GROH...................................................................... VP, FINANCE & ADMINISTRATION	30.50 ................. 7.00		X			223,970	11,945	47,706
(10) RACHEL SHNEKENDORF...................................................................... SENIOR DIRECTOR, EDUCATION	37.50 ................. 0.00				X	179,665	0	26,955
(11) JENNIFER MORALES...................................................................... SENIOR DIRECTOR, PR & MARKETING	37.50 ................. 0.00				X	177,935	0	29,493
(12) GAYLE LEVY HARTMAN...................................................................... SENIOR DIRECTOR, DIGITAL & CONTENT STRATEGY	37.50 ................. 0.00				X	169,138	0	53,519
(13) STEVEN K SCHMITT MD...................................................................... IMMED. PAST PRESIDENT AS OF 10/2024	2.00 ................. 0.00	X	X			25,000	0	0
(14) TINA Q TAN MD...................................................................... PRESIDENT AS OF 10/2024	2.00 ................. 0.50	X	X			7,500	0	0
(15) CARLOS DEL RIO MD...................................................................... IMMED. PAST PRESIDENT UNTIL 10/2024	2.00 ................. 0.00	X	X			0	0	0
(16) RONALD NAHASS MD...................................................................... PRESIDENT ELECT AS OF 10/2024	2.00 ................. 0.50	X	X			0	0	0
(17) WENDY S ARMSTRONG MD...................................................................... VICE PRESIDENT AS OF 10/2024	2.00 ................. 0.50	X	X			0	0	0

Form 990 (2024)

Page 8

Part VII

Section A. Officers, Directors, Trustees, Key Employees, and Highest Compensated Employees (continued)

(A) Name and title	(B) Average hours per week (list any hours for related organizations below dotted line)	(C) Position (do not check more than one box, unless person is both an officer and a director/trustee)		(D) Reportable compensation from the organization (W-2/1099-MISC/1099-NEC)	(E) Reportable compensation from related organizations (W-2/1099-MISC/1099-NEC)	(F) Estimated amount of other compensation from the organization and related organizations
(A) Name and title
(18) MAXIMO BRITO MD........................................................................ TREASURER	2.00 .......................0.50	X	X	0	0	0
(19) ROBIN TROTMAN MD........................................................................ SECRETARY	2.00 .......................0.00	X	X	0	0	0
(20) ERIN BONURA MD........................................................................ DIRECTOR	1.00 .......................0.00	X		0	0	0
(21) ROBIN HENRY DRETLER MD........................................................................ DIRECTOR	1.00 .......................0.00	X		0	0	0
(22) MATIFADZA HLATSHWAYO DAVIS MD MPH........................................................................ DIRECTOR	1.00 .......................0.00	X		0	0	0
(23) HEATHER C YUN MD........................................................................ DIRECTOR	1.00 .......................0.00	X		0	0	0
(24) BONNIE M WORD MD........................................................................ DIRECTOR	1.00 .......................0.00	X		0	0	0
(25) DAVID ARONOFF MD........................................................................ DIRECTOR AS OF 10/2024	1.00 .......................0.00	X		0	0	0
(26) UPINDER SINGH MD........................................................................ DIRECTOR AS OF 10/2024	1.00 .......................0.00	X		0	0	0
(27) RAJESH T GHANDI MD........................................................................ DIRECTOR	1.00 .......................0.00	X		0	0	0
(28) KAMI KIM MD........................................................................ DIRECTOR	1.00 .......................0.00	X		0	0	0

1b	Sub-Total..............
c	Total from continuation sheets to Part VII, Section A..
d	Total (add lines 1b and 1c).........	3,350,631	144,479	580,230

Total number of individuals (including but not limited to those listed above) who received more than $100,000 of reportable compensation from the organization 52

Yes

Did the organization list any former officer, director or trustee, key employee, or highest compensated employee on line 1a? If "Yes," complete Schedule J for such individual ..............

For any individual listed on line 1a, is the sum of reportable compensation and other compensation from the organization and related organizations greater than $150,000? If "Yes," complete Schedule J for such
individual...........................

Yes

Did any person listed on line 1a receive or accrue compensation from any unrelated organization or individual for services rendered to the organization? If "Yes," complete Schedule J for such person ........

Section B. Independent Contractors

Complete this table for your five highest compensated independent contractors that received more than $100,000 of compensation from the organization. Report compensation for the calendar year ending with or within the organization’s tax year.

(A) Name and business address	(B) Description of services	(C) Compensation
HART HEALTH STRATEGIES 3823 FORDHAM RD NW WASHINGTON,DC20005	CONSULTING	300,000
ARENTFOX SCHIFF LLP 1717 K STREET NW WASHINGTON,DC20006	CONSULTING	175,640
DRASHTI LLC 25527 BERESFORD DRIVE CHANTILLY,VA20152	CONSULTING	158,400
PAUL E SAX, 78 CROWNINSHIELD ROAD BROOKLINE,MA02446	CONSULTING	153,340
COLLIER COLLECTIVE LLC 527 14TH STREET NE WASHINGTON,DC20002	CONSULTING	128,500
2 Total number of independent contractors (including but not limited to those listed above) who received more than $100,000 of compensation from the organization 6

Form 990 (2024)

Page 9

Part VIII

Statement of Revenue

Check if Schedule O contains a response or note to any line in this Part VIII.............

(A)
Total revenue

(B)
Related or
exempt
function
revenue

(D)
Revenue
excluded from
tax under sections
512 - 514

1a	Federated campaigns..		1a
b	Membership dues..		1b
c	Fundraising events..		1c
d	Related organizations		1d
e	Government grants (contributions)		1e	1,131,324

f	All other contributions, gifts, grants, and similar amounts not included above		1f	285,586

g	Noncash contributions included in lines 1a - 1f:$		1g

h Total. Add lines 1a-1f.......		1,416,910

		Business Code
2a	ANNUAL MEETING	900099	14,354,523	14,354,523
b	JOURNALS	900099	8,157,653	8,157,653
c	MEMBERSHIP DUES	900099	3,012,730	2,948,267	64,463
d	MANAGEMENT FEES	900099	2,199,502	2,199,502
e	EDUCATION PROGRAMS	900099	889,755	889,755
f	All other program service revenue.		3,500	3,500
g	Total. Add lines 2a–2f .....		28,617,663

3 Investment income (including dividends, interest, and othersimilar amounts) ......			1,475,671			1,475,671
4 Income from investment of tax-exempt bond proceeds
5 Royalties...........			552,121	389,759	5,000	157,362
			(i) Real	(ii) Personal
6a	Gross rents	6a
b	Less: rental expenses	6b
c	Rental income or (loss)	6c
d	Net rental income or (loss).......
			(i) Securities	(ii) Other
7a	Gross amount from sales of assets other than inventory	7a
b	Less: cost or other basis and sales expenses	7b
c	Gain or (loss)	7c
d	Net gain or (loss).........
8a	Gross income from fundraising events (not including $ of contributions reported on line 1c). See Part IV, line 18 ....
			8a
b	Less: direct expenses ...		8b
c	Net income or (loss) from fundraising events..
9a	Gross income from gaming activities. See Part IV, line 19 ...
			9a
b	Less: direct expenses ...		9b
c	Net income or (loss) from gaming activities..
10a	Gross sales of inventory, less returns and allowances ..
			10a
b	Less: cost of goods sold ..		10b
c	Net income or (loss) from sales of inventory..

Business Code
11a	UNBILLED COSTS		900099	130,587			130,587
b	OTHER REVENUE		900099	66,989			66,989
c
d	All other revenue ....
e	Total. Add lines 11a–11d ......			197,576
12	Total revenue. See instructions.....			32,259,941	28,942,959	69,463	1,830,609

Form 990 (2024)

Page 10

Part IX

Statement of Functional Expenses

Section 501(c)(3) and 501(c)(4) organizations must complete all columns. All other organizations must complete column (A).Check if Schedule O contains a response or note to any line in this Part IX..............

Do not include amounts reported on lines 6b, 7b, 8b, 9b, and 10b of Part VIII.		(A) Total expenses	(B) Program service expenses	(C) Management and general expenses	(D) Fundraising expenses

1	Grants and other assistance to domestic organizations and domestic governments. See Part IV, line 21 ....	250,000
2	Grants and other assistance to domestic individuals. See Part IV, line 22 ...........	298,167
3	Grants and other assistance to foreign organizations, foreign governments, and foreign individuals. See Part IV, lines 15 and 16. .............	512,079
4	Benefits paid to or for members .......
5	Compensation of current officers, directors, trustees, and key employees ...........	2,702,916
6	Compensation not included above, to disqualified persons (as defined under section 4958(f)(1)) and persons described in section 4958(c)(3)(B) .........
7	Other salaries and wages........	10,499,131
8	Pension plan accruals and contributions (include section 401(k) and 403(b) employer contributions) ....	598,407
9	Other employee benefits .......	881,465
10	Payroll taxes ...........	876,632
11	Fees for services (non-employees):
a	Management ......
b	Legal .........	213,573
c	Accounting ...........	57,023
d	Lobbying ...........	576,750
e	Professional fundraising services. See Part IV, line 17
f	Investment management fees ......	162,783
g	Other (If line 11g amount exceeds 10% of line 25, column (A) amount, list line 11g expenses on Schedule O)	7,944,489
12	Advertising and promotion ....	776,818
13	Office expenses .......	2,636,112
14	Information technology ......	683,399
15	Royalties ..
16	Occupancy ...........	808,969
17	Travel ............	1,526,650
18	Payments of travel or entertainment expenses for any federal, state, or local public officials .
19	Conferences, conventions, and meetings ....	6,804,342
20	Interest ...........
21	Payments to affiliates .......
22	Depreciation, depletion, and amortization ..	426,092
23	Insurance ...	285,394
24	Other expenses. Itemize expenses not covered above (List miscellaneous expenses in line 24e. If line 24e amount exceeds 10% of line 25, column (A) amount, list line 24e expenses on Schedule O.)
a
b
c
d
e	All other expenses
25	Total functional expenses. Add lines 1 through 24e	39,521,191
26	Joint costs. Complete this line only if the organization reported in column (B) joint costs from a combined educational campaign and fundraising solicitation. Check here if following SOP 98-2 (ASC 958-720).

Form 990 (2024)

Page 11

Part X

Balance Sheet

Check if Schedule O contains a response or note to any line in this Part IX..............

				(A) Beginning of year		(B) End of year

1	Cash–non-interest-bearing ........			1,030,120	1	2,248,992
2	Savings and temporary cash investments .........			1,685,037	2	1,714,366
3	Pledges and grants receivable, net ......				3
4	Accounts receivable, net .............			3,501,022	4	2,300,038
5	Loans and other receivables from any current or former officer, director, trustee, key employee, creator or founder, substantial contributor, or 35% controlled entity or family member of any of these persons .......
					5
6	Loans and other receivables from other disqualified persons (as defined under section 4958(f)(1)), and persons described in section 4958(c)(3)(B) ...
					6
7	Notes and loans receivable, net ...........				7
8	Inventories for sale or use ............				8
9	Prepaid expenses and deferred charges ......			745,103	9	928,159
10a	Land, buildings, and equipment: cost or other basis. Complete Part VI of Schedule D	10a	3,115,468
b	Less: accumulated depreciation	10b	1,602,868	1,938,692	10c	1,512,600
11	Investments—publicly traded securities .			46,913,163	11	44,930,525
12	Investments—other securities. See Part IV, line 11 .....			4,719,232	12	5,078,418
13	Investments—program-related. See Part IV, line 11 ..				13
14	Intangible assets ...............				14
15	Other assets. See Part IV, line 11 ...........			7,572,997	15	7,571,882
16	Total assets. Add lines 1 through 15 (must equal line 33)...			68,105,366	16	66,284,980

17	Accounts payable and accrued expenses .....	2,772,658	17	4,626,755
18	Grants payable ...		18
19	Deferred revenue .........	4,312,114	19	4,322,565
20	Tax-exempt bond liabilities .........		20
21	Escrow or custodial account liability. Complete Part IV of Schedule D		21
22	Loans and other payables to any current or former officer, director, trustee, key employee, creator or founder, substantial contributor, or 35% controlled entity or family member of any of these persons .........
			22
23	Secured mortgages and notes payable to unrelated third parties ..		23
24	Unsecured notes and loans payable to unrelated third parties ..		24
25	Other liabilities (including federal income tax, payables to related third parties, and other liabilities not included on lines 17 - 24). Complete Part X of Schedule D	9,193,344	25	8,282,729
26	Total liabilities. Add lines 17 through 25..	16,278,116	26	17,232,049

	Organizations that follow FASB ASC 958, check here and complete lines 27, 28, 32, and 33.
27	Net assets without donor restrictions ..........	51,827,250	27	49,052,931
28	Net assets with donor restrictions ...........		28
	Organizations that do not follow FASB ASC 958, check here and complete lines 29 through 33.
29	Capital stock or trust principal, or current funds .....		29
30	Paid-in or capital surplus, or land, building or equipment fund ...		30
31	Retained earnings, endowment, accumulated income, or other funds		31
32	Total net assets or fund balances ...........	51,827,250	32	49,052,931
33	Total liabilities and net assets/fund balances ........	68,105,366	33	66,284,980

Form 990 (2024)

Page 12

Part XI

Reconcilliation of Net Assets

Check if Schedule O contains a response or note to any line in this Part XI..............

Total revenue (must equal Part VIII, column (A), line 12) ............

32,259,941

Total expenses (must equal Part IX, column (A), line 25) ............

39,521,191

Revenue less expenses. Subtract line 2 from line 1 ..............

-7,261,250

Net assets or fund balances at beginning of year (must equal Part X, line 32, column (A)) ..

51,827,250

Net unrealized gains (losses) on investments ...............

4,486,931

Donated services and use of facilities .................

Investment expenses .....................

Prior period adjustments .....................

Other changes in net assets or fund balances (explain in Schedule O) ........

Net assets or fund balances at end of year. Combine lines 3 through 9 (must equal Part X, line 32, column (B))

49,052,931

Part XII

Financial Statements and Reporting

Check if Schedule O contains a response or note to any line in this Part XII.............

Yes

Accounting method used to prepare the Form 990: Cash Accrual Other
If the organization changed its method of accounting from a prior year or checked "Other," explain on
Schedule O.

Were the organization’s financial statements compiled or reviewed by an independent accountant?

If ‘Yes,’ check a box below to indicate whether the financial statements for the year were compiled or reviewed on a separate basis, consolidated basis, or both:

Separate basis Consolidated basis Both consolidated and separate basis

Were the organization’s financial statements audited by an independent accountant?

Yes

If ‘Yes,’ check a box below to indicate whether the financial statements for the year were audited on a separate basis, consolidated basis, or both:

Separate basis Consolidated basis Both consolidated and separate basis

If "Yes," to line 2a or 2b, does the organization have a committee that assumes responsibility for oversight of the audit, review, or compilation of its financial statements and selection of an independent accountant?

Yes

If the organization changed either its oversight process or selection process during the tax year, explain in Schedule O.

As a result of a federal award, was the organization required to undergo an audit or audits as set forth in the Uniform Guidance, 2 C.F.R. Part 200, Subpart F?

Yes

If "Yes," did the organization undergo the required audit or audits? If the organization did not undergo the required audit or audits, explain why in Schedule O and describe any steps taken to undergo such audits.

Yes

Form 990 (2024)

Additional Data

Software ID:
Software Version:

Form 990, Special Condition Description:

Special Condition Description

- TIN:

Schedule B
(Form 990)
(Rev. January 2025)

Department of the Treasury
Internal Revenue Service

Schedule of Contributors

Attach to Form 990, 990-EZ, or 990-PF.

Go to www.irs.gov/Form990 for the latest information.

OMB No. 1545-0047

Name of the organization

INFECTIOUS DISEASES SOCIETY OF AMERICA

Employer identification number

23-7045686

Organization type (check one):

Filers of:

Section:

Form 990 or 990-EZ

501(c)( ) (enter number) organization

4947(a)(1) nonexempt charitable trust not treated as a private foundation

527 political organization

Form 990-PF

501(c)(3) exempt private foundation

4947(a)(1) nonexempt charitable trust treated as a private foundation

501(c)(3) taxable private foundation

Check if your organization is covered by the General Rule or a Special Rule.
Note: Only a section 501(c)(7), (8), or (10) organization can check boxes for both the General Rule and a Special Rule. See instructions.

General Rule

For an organization filing Form 990, 990-EZ, or 990-PF that received, during the year, contributions totaling $5,000 or more (in money or other property) from any one contributor. Complete Parts I and II. See instructions for determining a contributor's total contributions.

Special Rules

For an organization described in section 501(c)(3) filing Form 990 or 990-EZ that met the 33¹/3% support test of the regulations
under sections 509(a)(1) and 170(b)(1)(A)(vi), that checked Schedule A (Form 990 or 990-EZ), Part II, line 13, 16a, or 16b, and that received from any one contributor, during the year, total contributions of the greater of (1) $5,000 or (2) 2% of the amount on (i) Form 990, Part VIII, line 1h, or (ii) Form 990-EZ, line 1. Complete Parts I and II.

For an organization described in section 501(c)(7), (8), or (10) filing Form 990 or 990-EZ that received from any one contributor,
during the year, total contributions of more than $1,000 exclusively for religious, charitable, scientific, literary, or educational purposes, or for the prevention of cruelty to children or animals. Complete Parts I, II, and III.

For an organization described in section 501(c)(7), (8), or (10) filing Form 990 or 990-EZ that received from any one contributor,
during the year, contributions exclusively for religious, charitable, etc., purposes, but no such contributions totaled more than $1,000. If this box is checked, enter here the total contributions that were received during the year for an exclusively religious, charitable, etc., purpose. Don't complete any of the parts unless the General Rule applies to this organization because it received nonexclusively religious, charitable, etc., contributions totaling $5,000 or more during the year ......... Right Arrow

Caution: An organization that isn't covered by the General Rule and/or the Special Rules doesn't file Schedule B (Form 990,
990-EZ, or 990-PF), but it must answer “No” on Part IV, line 2, of its Form 990; or check the box on line H of its Form 990-EZ
or on its Form 990PF, Part I, line 2, to certify that it doesn't meet the filing requirements of Schedule B (Form 990,
990-EZ, or 990-PF).

For Paperwork Reduction Act Notice, see the Instructions
for Form 990, 990-EZ, or 990-PF.

Cat. No. 30613XSchedule B (Form 990) (Rev. 1-2025)

Schedule B (Form 990) (Rev. 1-2025) Page 2

Name of organization INFECTIOUS DISEASES SOCIETY OF AMERICA

Part I	Contributors (see instructions). Use duplicate copies of Part I if additional space is needed.
(a) No.	(b) Name, address, and ZIP + 4	(c) Total contributions	(d) Type of contribution
RESTRICTED	,	$ RESTRICTED	Person Payroll Noncash (Complete Part II for noncash contributions.)
(a) No.	(b) Name, address, and ZIP + 4	(c) Total contributions	(d) Type of contribution
		$	Person Payroll Noncash (Complete Part II for noncash contributions.)
(a) No.	(b) Name, address, and ZIP + 4	(c) Total contributions	(d) Type of contribution
		$	Person Payroll Noncash (Complete Part II for noncash contributions.)
(a) No.	(b) Name, address, and ZIP + 4	(c) Total contributions	(d) Type of contribution
		$	Person Payroll Noncash (Complete Part II for noncash contributions.)
(a) No.	(b) Name, address, and ZIP + 4	(c) Total contributions	(d) Type of contribution
		$	Person Payroll Noncash (Complete Part II for noncash contributions.)
(a) No.	(b) Name, address, and ZIP + 4	(c) Total contributions	(d) Type of contribution
		$	Person Payroll Noncash (Complete Part II for noncash contributions.)
Schedule B (Form 990) (Rev. 1-2025)

Schedule B (Form 990) (Rev. 1-2025)

Page 3

Name of organization INFECTIOUS DISEASES SOCIETY OF AMERICA		Employer identification number 23-7045686

Part II	Noncash Property (see instructions). Use duplicate copies of Part II if additional space is needed.
(a) No. from Part I	(b) Description of noncash property given	(c) FMV (or estimate) (See instructions)	(d) Date received
		$
(a) No. from Part I	(b) Description of noncash property given	(c) FMV (or estimate) (See instructions)	(d) Date received
		$
(a) No. from Part I	(b) Description of noncash property given	(c) FMV (or estimate) (See instructions)	(d) Date received
		$
(a) No. from Part I	(b) Description of noncash property given	(c) FMV (or estimate) (See instructions)	(d) Date received
		$
(a) No. from Part I	(b) Description of noncash property given	(c) FMV (or estimate) (See instructions)	(d) Date received
		$
(a) No. from Part I	(b) Description of noncash property given	(c) FMV (or estimate) (See instructions)	(d) Date received
		$
Schedule B (Form 990) (Rev. 1-2025)

Schedule B (Form 990) (Rev. 1-2025)

Page 4


Name of organization INFECTIOUS DISEASES SOCIETY OF AMERICA			Employer identification number 23-7045686
Part III Exclusively religious, charitable, etc., contributions to organizations described in section 501(c) (7), (8), or (10) that total more than $1,000 for the year from any one contributor. Complete columns (a) through (e) and the following line entry. For organizations completing Part III, enter the total of exclusively religious, charitable, etc., contributions of $1,000 or less for the year. (Enter this information once. See instructions.) $ Use duplicate copies of Part III if additional space is needed.

(a)
No. from Part I

(b) Purpose of gift

(d) Description of how gift is held

(e) Transfer of gift
Transferee's name, address, and ZIP 4	Relationship of transferor to transferee

(a)
No. from Part I

(b) Purpose of gift

(d) Description of how gift is held

(e) Transfer of gift
Transferee's name, address, and ZIP 4	Relationship of transferor to transferee

(a)
No. from Part I

(b) Purpose of gift

(d) Description of how gift is held

(e) Transfer of gift
Transferee's name, address, and ZIP 4	Relationship of transferor to transferee

(a)
No. from Part I

(b) Purpose of gift

(d) Description of how gift is held

(e) Transfer of gift
Transferee's name, address, and ZIP 4	Relationship of transferor to transferee

Schedule B (Form 990) (Rev. 1-2025)

Additional Data

Software ID:
Software Version:

- TIN:

SCHEDULE C
(Form 990)

Department of the Treasury
Internal Revenue Service

Political Campaign and Lobbying Activities

For Organizations Exempt From Income Tax Under section 501(c) and section 527

right arrow

Complete if the organization is described below. right arrow

Attach to Form 990 or Form 990-EZ.
right arrow

Go to www.irs.gov/Form990 for instructions and the latest information.

OMB No. 1545-0047

2024

Open to Public
Inspection

If the organization answered "Yes" on Form 990, Part IV, Line 3, or Form 990-EZ, Part V, line 46 (Political Campaign Activities), then
Round Bullet

Section 501(c)(3) organizations: Complete Parts I-A and B. Do not complete Part I-C.
Round Bullet

Section 501(c) (other than section 501(c)(3)) organizations: Complete Parts I-A and C below. Do not complete Part I-B.
Round Bullet

Section 527 organizations: Complete Part I-A only.
If the organization answered "Yes" on Form 990, Part IV, Line 4, or Form 990-EZ, Part VI, line 47 (Lobbying Activities), then
Round Bullet

Section 501(c)(3) organizations that have filed Form 5768 (election under section 501(h)): Complete Part II-A. Do not complete Part II-B.
Round Bullet

Section 501(c)(3) organizations that have NOT filed Form 5768 (election under section 501(h)): Complete Part II-B. Do not complete Part II-A.
If the organization answered "Yes" on Form 990, Part IV, Line 5 (Proxy Tax) (see separate instructions) or Form 990-EZ, Part V, line 35c (Proxy Tax) (see separate instructions), then
Round Bullet

Section 501(c)(4), (5), or (6) organizations: Complete Part III.

Name of the organization

INFECTIOUS DISEASES SOCIETY OF AMERICA

Employer identification number

23-7045686

Part I-A

Complete if the organization is exempt under section 501(c) or is a section 527 organization.

Provide a description of the organization’s direct and indirect political campaign activities in Part IV. See instructions for definition of “political campaign activities."

Political campaign activity expenditures. See instructions .................................................................... right arrow

Volunteer hours for political campaign activities. See instructions ..................................................................

Part I-B

Complete if the organization is exempt under section 501(c)(3).

Enter the amount of any excise tax incurred by the organization under section 4955 ................................ right arrow

Enter the amount of any excise tax incurred by organization managers under section 4955 ....................... right arrow

If the organization incurred a section 4955 tax, did it file Form 4720 for this year? .........................................

Yes No

Was a correction made? ......................................................................................................................

Yes No

If "Yes," describe in Part IV.

Part I-C

Complete if the organization is exempt under section 501(c), except section 501(c)(3).

Enter the amount directly expended by the filing organization for section 527 exempt function activities ..... right arrow

Enter the amount of the filing organization's funds contributed to other organizations for section 527 exempt function activities ............................................................................................................................ right arrow

Total exempt function expenditures. Add lines 1 and 2. Enter here and on Form 1120-POL, line 17b........... right arrow

Did the filing organization file Form 1120-POL for this year? ...................................................................

Yes No

Enter the names, addresses and employer identification number (EIN) of all section 527 political organizations to which the filing
organization made payments. For each organization listed, enter the amount paid from the filing organization’s funds. Also enter the amount of political contributions received that were promptly and directly delivered to a separate political organization, such as a separate segregated fund or a political action committee (PAC). If additional space is needed, provide information in Part IV.

(a) Name	(b) Address	(c) EIN	(d) Amount paid from filing organization's funds. If none, enter -0-.	(e) Amount of political contributions received and promptly and directly delivered to a separate political organization. If none, enter -0-.
1
2
3
4
5
6

For Paperwork Reduction Act Notice, see the instructions for Form 990.

Cat. No. 50084S

Schedule C (Form 990) 2024

Page 2

Part II-A

Complete if the organization is exempt under section 501(c)(3) and filed Form 5768 (election under section 501(h)).

A Check right arrow

if the filing organization belongs to an affiliated group (and list in Part IV each affiliated group member's name, address, EIN, expenses, and share of excess lobbying expenditures).
B Check right arrow

if the filing organization checked box A and "limited control" provisions apply.

Limits on Lobbying Expenditures (The term "expenditures" means amounts paid or incurred.)		(b) Affiliated group totals
1a	Total lobbying expenditures to influence public opinion (grass roots lobbying) ......................
b	Total lobbying expenditures to influence a legislative body (direct lobbying) ........................
c	Total lobbying expenditures (add lines 1a and 1b) ............................................................
d	Other exempt purpose expenditures ...............................................................................
e	Total exempt purpose expenditures (add lines 1c and 1d) ..................................................
f	Lobbying nontaxable amount. Enter the amount from the following table in both columns.
	If the amount on line 1e, column (a) or (b) is:The lobbying nontaxable amount is:
	Not over $500,00020% of the amount on line 1e.
	Over $500,000 but not over $1,000,000$100,000 plus 15% of the excess over $500,000.
	Over $1,000,000 but not over $1,500,000$175,000 plus 10% of the excess over $1,000,000.
	Over $1,500,000 but not over $17,000,000$225,000 plus 5% of the excess over $1,500,000.
	Over $17,000,000$1,000,000.

g	Grassroots nontaxable amount (enter 25% of line 1f) .................................................
h	Subtract line 1g from line 1a. If zero or less, enter -0-. ................................................
i	Subtract line 1f from line 1c. If zero or less, enter -0-. ................................................
j	If there is an amount other than zero on either line 1h or line 1i, did the organization file Form 4720 reporting section 4911 tax for this year? ...................................................................................................................	Yes No

4-Year Averaging Period Under Section 501(h) (Some organizations that made a section 501(h) election do not have to complete all of the five columns below. See the separate instructions for lines 2a through 2f.)
Lobbying Expenditures During 4-Year Averaging Period
	Calendar year (or fiscal year beginning in)	(a) 2021	(b) 2022	(c) 2023	(d) 2024	(e) Total

2a	Lobbying nontaxable amount

b	Lobbying ceiling amount (150% of line 2a, column(e))

c	Total lobbying expenditures

d	Grassroots nontaxable amount

e	Grassroots ceiling amount (150% of line 2d, column (e))

f	Grassroots lobbying expenditures

Schedule C (Form 990) 2024

Page 3

Part II-B

Complete if the organization is exempt under section 501(c)(3) and has NOT filed Form 5768 (election under section 501(h)).

For each "Yes" response on lines 1a through 1i below, provide in Part IV a detailed description of the lobbying activity.

(a)

Yes

(b)

Amount

During the year, did the filing organization attempt to influence foreign, national, state or local legislation, including any attempt to influence public opinion on a legislative matter or referendum, through the use of:

Volunteers? ...........................................................................................................

Paid staff or management (include compensation in expenses reported on lines 1c through 1i)? ........

Media advertisements? ...................................................................................................

Mailings to members, legislators, or the public? .............................................................................

Publications, or published or broadcast statements? ...........................................................

Grants to other organizations for lobbying purposes? ..........................................................

Direct contact with legislators, their staffs, government officials, or a legislative body? .......................

Rallies, demonstrations, seminars, conventions, speeches, lectures, or any similar means? ..................

Other activities? ...................................................................................................................

Total. Add lines 1c through 1i ....................................................................................................

Did the activities in line 1 cause the organization to be not described in section 501(c)(3)? .....

If "Yes," enter the amount of any tax incurred under section 4912 ...........................................

If "Yes," enter the amount of any tax incurred by organization managers under section 4912 ...................

If the filing organization incurred a section 4912 tax, did it file Form 4720 for this year? ........................

Part III-A

Complete if the organization is exempt under section 501(c)(4), section 501(c)(5), or section 501(c)(6).

Yes

Were substantially all (90% or more) dues received nondeductible by members? ...............................................

Did the organization make only in-house lobbying expenditures of $2,000 or less? ............................................

Did the organization agree to carry over lobbying and political expenditures from the prior year? .................................

Yes

Part III-B

Complete if the organization is exempt under section 501(c)(4), section 501(c)(5), or section 501(c)(6) and if either (a) BOTH Part III-A, lines 1 and 2, are answered "No" OR (b) Part III-A, line 3, is answered “Yes."

Dues, assessments and similar amounts from members ......................................................................

3,410,989

Section 162(e) nondeductible lobbying and political expenditures (do not include amounts of political expenses for which the section 527(f) tax was paid).

Current year .............................................................................................................................

673,239

Carryover from last year ............................................................................................................

-859,938

Total ...........................................................................................................................................

-186,699

Aggregate amount reported in section 6033(e)(1)(A) notices of nondeductible section 162(e) dues .

272,879

If notices were sent and the amount on line 2c exceeds the amount on line 3, what portion of the excess does the organization agree to carryover to the reasonable estimate of nondeductible lobbying and political expenditure next year? ......................................................................................................................

Taxable amount of lobbying and political expenditures. See Instructions .........................................

-459,578

Part IV

Supplemental Information

Provide the descriptions required for Part l-A, line 1; Part l-B, line 4; Part l-C, line 5; Part II-A (affiliated group list); Part II-A, lines 1 and 2 (see instructions), and Part ll-B, line 1. Also, complete this part for any additional information.

Return Reference	Explanation

Schedule C (Form 990) 2024

Additional Data

Software ID:
Software Version:

- TIN:

SCHEDULE D
(Form 990)

Department of the Treasury
Internal Revenue Service

Supplemental Financial Statements

Complete if the organization answered "Yes," on Form 990,
Part IV, line 6, 7, 8, 9, 10, 11a, 11b, 11c, 11d, 11e, 11f, 12a, or 12b.
right arrow

Attach to Form 990.
right arrow

Go to www.irs.gov/Form990 for instructions and the latest information.

OMB No. 1545-0047

Open to Public Inspection

Name of the organization

INFECTIOUS DISEASES SOCIETY OF AMERICA

Employer identification number

23-7045686

Part I

Organizations Maintaining Donor Advised Funds or Other Similar Funds or Accounts. Complete if the organization answered "Yes" on Form 990, Part IV, line 6.

		(a) Donor advised funds	(b) Funds and other accounts
1	Total number at end of year .........
2	Aggregate value of contributions to (during year)
3	Aggregate value of grants from (during year)
4	Aggregate value at end of year ........

Did the organization inform all donors and donor advisors in writing that the assets held in donor advised funds are the organization’s property, subject to the organization’s exclusive legal control? ............

Yes No

Did the organization inform all grantees, donors, and donor advisors in writing that grant funds can be used only for charitable purposes and not for the benefit of the donor or donor advisor, or for any other purpose conferring impermissible private benefit? ...................................

Yes No

Part II

Conservation Easements.
Complete if the organization answered "Yes" on Form 990, Part IV, line 7.

Purpose(s) of conservation easements held by the organization (check all that apply).

Preservation of land for public use (e.g., recreation or education) Preservation of an historically important land area

Protection of natural habitat Preservation of a certified historic structure

Preservation of open space

Complete lines 2a through 2d if the organization held a qualified conservation contribution in the form of a conservation easement on the last day of the tax year.


a	Total number of conservation easements ......................	2a
b	Total acreage restricted by conservation easements ....................	2b
c	Number of conservation easements on a certified historic structure included in (a) .....	2c
d	Number of conservation easements included in (c) acquired after July 25, 2006, and not on a historic structure listed in the National Register ...	2d

Number of conservation easements modified, transferred, released, extinguished, or terminated by the organization during the
tax year right arrow

Number of states where property subject to conservation easement is located right arrow

Does the organization have a written policy regarding the periodic monitoring, inspection, handling of violations, and enforcement of the conservation easements it holds? ............

Yes No

Staff and volunteer hours devoted to monitoring, inspecting, handling of violations, and enforcing conservation easements during the year
right arrow

Amount of expenses incurred in monitoring, inspecting, handling of violations, and enforcing conservation easements during the year
right arrow

Does each conservation easement reported on line 2(d) above satisfy the requirements of section 170(h)(4)(B)(i) and section 170(h)(4)(B)(ii)? .............................

Yes No

In Part XIII, describe how the organization reports conservation easements in its revenue and expense statement, and
balance sheet, and include, if applicable, the text of the footnote to the organization’s financial statements that describes
the organization’s accounting for conservation easements.

Part III

Organizations Maintaining Collections of Art, Historical Treasures, or Other Similar Assets.
Complete if the organization answered "Yes" on Form 990, Part IV, line 8.

If the organization elected, as permitted under FASB ASC 958, not to report in its revenue statement and balance sheet works of art, historical treasures, or other similar assets held for public exhibition, education, or research in furtherance of public service, provide, in Part XIII, the text of the footnote to its financial statements that describes these items.

If the organization elected, as permitted under FASB ASC 958, to report in its revenue statement and balance sheet works of art, historical treasures, or other similar assets held for public exhibition, education, or research in furtherance of public service, provide the following amounts relating to these items:

(i)

Revenue included on Form 990, Part VIII, line 1 ......................... right arrow

(ii)

Assets included in Form 990, Part X ............................... right arrow

If the organization received or held works of art, historical treasures, or other similar assets for financial gain, provide the
following amounts required to be reported under FASB ASC 958 relating to these items:

Revenue included on Form 990, Part VIII, line 1 .......................... right arrow

Assets included in Form 990, Part X ............................... right arrow

For Paperwork Reduction Act Notice, see the Instructions for Form 990.

Cat. No. 52283D

Schedule D (Form 990) (Rev. 1-2025)

Page 2

Part III

Organizations Maintaining Collections of Art, Historical Treasures, or Other Similar Assets (continued)

Using the organization’s acquisition, accession, and other records, check any of the following that are a significant use of its collection items (check all that apply):

Public exhibition

Loan or exchange programs

Scholarly research

Other

Preservation for future generations

Provide a description of the organization’s collections and explain how they further the organization’s exempt purpose in
Part XIII.

During the year, did the organization solicit or receive donations of art, historical treasures or other similar
assets to be sold to raise funds rather than to be maintained as part of the organization’s collection?...

Yes No

Part IV

Escrow and Custodial Arrangements. Complete if the organization answered "Yes" on Form 990, Part IV, line 9, or reported an amount on Form 990, Part X, line 21.

Is the organization an agent, trustee, custodian or other intermediary for contributions or other assets not
included on Form 990, Part X? ....................................

Yes No


b	If "Yes," explain the arrangement in Part XIII and complete the following table:		Amount
c	Beginning balance .............................	1c
d	Additions during the year ............................	1d
e	Distributions during the year ..........................	1e
f	Ending balance ................................	1f

Did the organization include an amount on Form 990, Part X, line 21, for escrow or custodial account liability? ...

Yes No

If "Yes," explain the arrangement in Part XIII. Check here if the explanation has been provided in Part XIII ....

Part V

Endowment Funds.
Complete if the organization answered "Yes" on Form 990, Part IV, line 10.

		(a) Current year	(b) Prior year	(c) Two years back	(d) Three years back	(e) Four years back

1a	Beginning of year balance ....
b	Contributions ...
c	Net investment earnings, gains, and losses
d	Grants or scholarships ...
e	Other expenditures for facilities and programs ...
f	Administrative expenses ....
g	End of year balance ......

Provide the estimated percentage of the current year end balance (line 1g, column (a)) held as:

Board designated or quasi-endowment right arrow

Permanent endowment right arrow

Term endowment right arrow

The percentages on lines 2a, 2b, and 2c should equal 100%.

Are there endowment funds not in the possession of the organization that are held and administered for the
organization by:

Yes

(i) Unrelated organizations .................

3a(i)

(ii) Related organizations .................

3a(ii)

If "Yes" on 3a(ii), are the related organizations listed as required on Schedule R? .........

Describe in Part XIII the intended uses of the organization's endowment funds.

Part VI

Land, Buildings, and Equipment.
Complete if the organization answered "Yes" on Form 990, Part IV, line 11a. See Form 990, Part X, line 10.

Description of property		(a) Cost or other basis (investment)	(b) Cost or other basis (other)	(c) Accumulated depreciation	(d) Book value

1a	Land .....
b	Buildings ....
c	Leasehold improvements	2,034,916	822,925	1,211,991
d	Equipment ....	521,671	221,062	300,609
e	Other .....	558,881	558,881	0
Total. Add lines 1a through 1e. (Column (d) must equal Form 990, Part X, column (B), line 10(c).)..				1,512,600

Schedule D (Form 990) (Rev. 1-2025)

Page 3

Part VII

Investments - Other Securities.
Complete if the organization answered "Yes" on Form 990, Part IV, line 11b. See Form 990, Part X, line 12.

(a) Description of security or category (including name of security)	(b) Book value	(c) Method of valuation: Cost or end-of-year market value
(1) Financial derivatives.........
(2) Closely-held equity interests........
(3) Other (A) PRIVATELY HELD SEC.	5,078,418	F
(B)
(C)
(D)
(E)
(F)
(G)
(H)
Total. (Column (b) must equal Form 990, Part X, col. (B) line 12.)	5,078,418

Part VIII

Investments - Program Related. Complete if the organization answered 'Yes' on Form 990, Part IV, line 11c. See Form 990, Part X, line 13.

(a) Description of investment	(b) Book value	(c) Method of valuation: Cost or end-of-year market value

(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
Total. (Column (b) must equal Form 990, Part X, col.(B) line 13.)

Part IX

Other Assets.
Complete if the organization answered 'Yes' on Form 990, Part IV, line 11d. See Form 990, Part X, line 15.

(a) Description				(b) Book value
(1)DUE FROM AFFILIATES				1,317,997
(2)SECURITY DEPOSIT				78,720
(3)RIGHT OF USE ASSET				5,966,033
(4)457 ASSET				209,132
(4)
(5)
(6)
(7)
(8)
(9)
Total. (Column (b) must equal Form 990, Part X, col.(B) line 15.)...........				7,571,882

Part X

Other Liabilities.
Complete if the organization answered 'Yes' on Form 990, Part IV, line 11e or 11f. See Form 990, Part X, line 25.

1.(a) Description of liability	(b) Book value
(1) Federal income taxes
457 LIABILITY	209,132
LEASE LIABILITY	8,073,597







Total. (Column (b) must equal Form 990, Part X, col.(B) line 25.)	8,282,729
2. Liability for uncertain tax positions. In Part XIII, provide the text of the footnote to the organization's financial statements that reports the organization's liability for uncertain tax positions under FIN 48 (ASC 740). Check here if the text of the footnote has been provided in Part XIII

Schedule D (Form 990) (Rev. 1-2025)

Page 4

Part XI Reconciliation of Revenue per Audited Financial Statements With Revenue per Return. Complete if the organization answered 'Yes' on Form 990, Part IV, line 12a.
1	Total revenue, gains, and other support per audited financial statements .......		1
2	Amounts included on line 1 but not on Form 990, Part VIII, line 12:
a	Net unrealized gains (losses) on investments ....	2a
b	Donated services and use of facilities .........	2b
c	Recoveries of prior year grants ...........	2c
d	Other (Describe in Part XIII.) ...........	2d
e	Add lines 2a through 2d .....................		2e
3	Subtract line 2e from line 1..................		3
4	Amounts included on Form 990, Part VIII, line 12, but not on line 1:
a	Investment expenses not included on Form 990, Part VIII, line 7b .	4a
b	Other (Describe in Part XIII.) ...........	4b
c	Add lines 4a and 4b....................		4c
5	Total revenue. Add lines 3 and 4c. (This must equal Form 990, Part I, line 12.) ......		5

Part XII Reconciliation of Expenses per Audited Financial Statements With Expenses per Return. Complete if the organization answered 'Yes' on Form 990, Part IV, line 12a.
1	Total expenses and losses per audited financial statements ...........		1
2	Amounts included on line 1 but not on Form 990, Part IX, line 25:
a	Donated services and use of facilities .........	2a
b	Prior year adjustments ............	2b
c	Other losses ................	2c
d	Other (Describe in Part XIII.) ...........	2d
e	Add lines 2a through 2d....................		2e
3	Subtract line 2e from line 1...................		3
4	Amounts included on Form 990, Part IX, line 25, but not on line 1:
a	Investment expenses not included on Form 990, Part VIII, line 7b ..	4a
b	Other (Describe in Part XIII.) ...........	4b
c	Add lines 4a and 4b.....................		4c
5	Total expenses. Add lines 3 and 4c. (This must equal Form 990, Part I, line 18.) ......		5

Part XIII

Supplemental Information

Provide the descriptions required for Part II, lines 3, 5, and 9; Part III, lines 1a and 4; Part lV, lines 1b and 2b; Part V, line 4; Part X, line 2; Part XI, lines 2d and 4b; and Part XII, lines 2d and 4b. Also complete this part to provide any additional information.

Return Reference	Explanation

Schedule D (Form 990) (Rev. 1-2025)

Additional Data

Software ID:
Software Version:

- TIN:

SCHEDULE F(Form 990)
(Rev. January 2025)

Department of the Treasury
Internal Revenue Service

Statement of Activities Outside the United States

Complete if the organization answered "Yes" to Form 990, Part IV, line 14b, 15, or 16. Right arrow

Attach to Form 990. Right arrow

Go to www.irs.gov/Form990 for instructions and the latest information.

OMB No. 1545-0047

Open to Public Inspection

Name of the organization
INFECTIOUS DISEASES SOCIETY OF AMERICA

Employer identification number

23-7045686

Part I

General Information on Activities Outside the United States. Complete if the organization answered "Yes" on Form 990, Part IV, line 14b.

For grantmakers. Does the organization maintain records to substantiate the amount of its grants and

other assistance, the grantees’ eligibility for the grants or assistance, and the selection criteria used

to award the grants or assistance? . . . . . . . . . . . . . . . . . . . . . . . . .

Yes

For grantmakers. Describe in Part V the organization’s procedures for monitoring the use of its grants and other assistance outside the United States.

Activites per Region. (The following Part I, line 3 table can be duplicated if additional space is needed.)

(a) Region		(b) Number of offices in the region	(c) Number of employees, agents, and independent contractors in the region	(d) Activities conducted in region (by type) (such as, fundraising, program services, investments, grants to recipients located in the region)	(e) If activity listed in (d) is a program service, describe specific type of service(s) in the region	(f) Total expenditures for and investments in the region
	EAST ASIA	0	7	GRANTS TO RECIPIENTS	GRANTS	6,450
	EAST ASIA	0	16	PROGRAM SERVICES AND ASSISTANCE TO RECIPIENTS LOCATED IN THE REGION	TRAVEL REIMBURSEMENT AND HONORARIUM	136,853
	EUROPE	0	39	PROGRAM SERVICES AND ASSISTANCE TO RECIPIENTS LOCATED IN THE REGION	HONORARIUM, JOURNAL PUBLISHING, AND TRAVEL REIMBURSEMENT	206,665
	NORTH AMERICA	0	10	PROGRAM SERVICES AND ASSISTANCE TO RECIPIENTS LOCATED IN THE REGION	CONSULTING, HONORARIUM, SUBSCRIPTION, AND TRAVEL REIMBURSEMENT	65,320
	SOUTH AMERICA	0	10	PROGRAM SERVICES AND ASSISTANCE TO RECIPIENTS LOCATED IN THE REGION	TRAVEL REIMBURSEMENT AND HONORARIUM	39,891
	MIDDLE EAST AND NORTH AFRICA	0	2	GRANTS TO RECIPIENTS	GRANTS	3,200
	MIDDLE EAST AND NORTH AFRICA	0	3	PROGRAM SERVICES AND ASSISTANCE TO RECIPIENTS LOCATED IN THE REGION	TRAVEL REIMBURSEMENT AND HONORARIUM	4,935
	SOUTH ASIA	0	12	GRANTS TO RECIPIENTS	GRANTS	13,700
	SUB-SAHARAN AFRICA	0	2	PROGRAM SERVICES AND ASSISTANCE TO RECIPIENTS LOCATED IN THE REGION	HONORARIUM	4,000
	CENTRAL AMERICA AND THE CARIBBEAN	0	1	PROGRAM SERVICES AND ASSISTANCE TO RECIPIENTS LOCATED IN THE REGION	CONSULTING, HONORARIUM, SUBSCRIPTION, AND TRAVEL REIMBURSEMENT	2,465
	CENTRAL AMERICA AND THE CARIBBEAN	0	1	GRANTS TO RECIPIENTS	GRANTS	1,500
	SUB-SAHARAN AFRICA	0	1	GRANTS TO RECIPIENTS	GRANTS	1,500
	SOUTH AMERICA	0	1	GRANTS TO RECIPIENTS	GRANTS	19,500
	EUROPE (INCLUDING ICELAND & GREENLAND)	0	1	GRANTS TO RECIPIENTS	GRANTS	2,500
	NORTH AMERICA	0	4	GRANTS TO RECIPIENTS	GRANTS	3,600


3a	Sub-total ....	0	99			477,014
b	Total from continuation sheets to Part I ...	0	11			35,065
c	Totals (add lines 3a and 3b)	0	110			512,079

For Paperwork Reduction Act Notice, see the Instructions for Form 990.Cat. No. 50082W Schedule F (Form 990) (Rev. 1-2025)

Schedule F (Form 990) (Rev. 1-2025)

Page 2

Part II

Grants and Other Assistance to Organizations or Entities Outside the United States. Complete if the organization answered "Yes" on Form 990, Part IV, line 15, for any recipient who received more than $5,000. Part II can be duplicated if additional space is needed.

1 (a) Name of organization		(b) IRS code section and EIN (if applicable)	(c) Region	(d) Purpose of grant	(e) Amount of cash grant	(f) Manner of cash disbursement	(g) Amount of noncash assistance	(h) Description of noncash assistance	(i) Method of valuation (book, FMV, appraisal, other)

2	Enter total number of recipient organizations listed above that are recognized as charities by the foreign country, recognized as tax-exempt by the IRS, or for which the grantee or counsel has provided a section 501(c)(3) equivalency letter .......
3	Enter total number of other organizations or entities .......................

Schedule F (Form 990) (Rev. 1-2025)

Schedule F (Form 990) (Rev. 1-2025)Page 3

Part III

Grants and Other Assistance to Individuals Outside the United States. Complete if the organization answered "Yes" on Form 990, Part IV, line 16.

Part III can be duplicated if additional space is needed.

	(b) Region	(c) Number of recipients	(d) Amount of cash grant	(e) Manner of cash disbursement	(g) Description of noncash assistance	(h) Method of valuation (book, FMV, appraisal, other)
PROGRAM SERVICES AND ASSISTANCE TO RECIPIENTS LOCATED IN THE REGION	SUB-SAHARAN AFRICA	2	4,000	WIRE TRANSFER	N/A	N/A
GRANTS TO RECIPIENTS	SOUTH ASIA	12	13,700	WIRE TRANSFER	N/A	N/A
GRANTS TO RECIPIENTS	SOUTH AMERICA	7	19,500	WIRE TRANSFER	N/A	N/A
PROGRAM SERVICES AND ASSISTANCE TO RECIPIENTS LOCATED IN THE REGION	SOUTH AMERICA	10	39,891	WIRE TRANSFER	N/A	N/A
GRANTS TO RECIPIENTS	NORTH AMERICA	4	3,600	WIRE TRANSFER	N/A	N/A
PROGRAM SERVICES AND ASSISTANCE TO RECIPIENTS LOCATED IN THE REGION	NORTH AMERICA	10	65,320	WIRE TRANSFER AND CHECK	N/A	N/A
GRANTS TO RECIPIENTS	MIDDLE EAST AND NORTH AFRICA	2	3,200	WIRE TRANSFER	N/A	N/A
PROGRAM SERVICES AND ASSISTANCE TO RECIPIENTS LOCATED IN THE REGION	MIDDLE EAST AND NORTH AFRICA	3	4,935	WIRE TRANSFER	N/A	N/A
GRANTS TO RECIPIENTS	EUROPE	1	2,500	WIRE TRANSFER	N/A	N/A
PROGRAM SERVICES AND ASSISTANCE TO RECIPIENTS LOCATED IN THE REGION	EUROPE	39	206,665	WIRE TRANSFER AND CHECK	N/A	N/A
GRANTS TO RECIPIENTS	EAST ASIA	7	6,450	WIRE TRANSFER	N/A	N/A
PROGRAM SERVICES AND ASSISTANCE TO RECIPIENTS LOCATED IN THE REGION	EAST ASIA	16	136,853	WIRE TRANSFER	N/A	N/A
GRANTS TO RECIPIENTS	CENTRAL AMERICA AND THE CARIBBEAN	1	1,500	WIRE TRANSFER	N/A	N/A
PROGRAM SERVICES AND ASSISTANCE TO RECIPIENTS LOCATED IN THE REGION	CENTRAL AMERICA AND THE CARIBBEAN	1	2,465	WIRE TRANSFER	N/A	N/A
GRANTS TO RECIPIENTS	SUB-SAHARAN AFRICA	1	1,500	WIRE TRANSFER	N/A	N/A

Schedule F (Form 990) (Rev. 1-2025)

Page 4

Part IV

Foreign Forms

Schedule F (Form 990) (Rev. 1-2025)

Page 5

Part V

Supplemental Information
Provide the information required by Part I, line 2 (monitoring of funds); Part I, line 3, column (f) (accounting method; amounts of investments vs. expenditures per region); Part II, line 1 (accounting method); Part III (accounting method); and Part III, column (c) (estimated number of recipients), as applicable. Also complete this part to provide any additional information. See instructions.

ReturnReference	Explanation
PART I, LINE 2:	THE ORGANIZATION MAINTAINS DETAILED RECORDS AND INTERNAL CONTROLS TO SUBSTANTIATE ALL GRANTS AND ASSISTANCE PROVIDED, INCLUDING DOCUMENTATION OF GRANT AMOUNTS, RECIPIENT ELIGIBILITY, PURPOSE, AND THE SELECTION AND APPROVAL CRITERIA. THESE RECORDS APPLY TO BOTH DOMESTIC AND INTERNATIONAL GRANTS SUPPORTING EDUCATION, RESEARCH, AND GLOBAL HEALTH PROGRAMS ALIGNED WITH THE ORGANIZATION'S MISSION.

Schedule F (Form 990) (Rev. 1-2025)

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Schedule I
(Form 990)
(Rev. January 2025)

Department of the Treasury
Internal Revenue Service

Grants and Other Assistance to Organizations,
Governments and Individuals in the United States

Complete if the organization answered "Yes," on Form 990, Part IV, line 21 or 22.
lBullet

Attach to Form 990.
lBullet

Go to www.irs.gov/Form990 for instructions and the latest information.

OMB No. 1545-0047

Open to Public
Inspection

Name of the organization
INFECTIOUS DISEASES SOCIETY OF AMERICA

Employer identification number
23-7045686

Part I

General Information on Grants and Assistance

Does the organization maintain records to substantiate the amount of the grants or assistance, the grantees' eligibility for the grants or assistance, and
the selection criteria used to award the grants or assistance? ........................

Yes No

Describe in Part IV the organization's procedures for monitoring the use of grant funds in the United States.

Part II

Grants and Other Assistance to Domestic Organizations and Domestic Governments. Complete if the organization answered "Yes" on Form 990, Part IV, line 21, for any recipient

that received more than $5,000. Part II can be duplicated if additional space is needed.

(a) Name and address of organization or government	(b) EIN	(c) IRC section (if applicable)	(d) Amount of cash grant	(e) Amount of non-cash assistance	(f) Method of valuation (book, FMV, appraisal, other)	(g) Description of noncash assistance	(h) Purpose of grant or assistance
(1) IDSA EDUCATION AND RESEARCH FOUNDATION 4040 WILSON BLVD STE 300 ARLINGTON,VA22203	31-1765388	501(C)(3)	250,000	0	N/A	N/A	PROGRAM SERVICE ACCOMPLISHMENTS

Enter total number of section 501(c)(3) and government organizations listed in the line 1 table ................. Bullet Image

Enter total number of other organizations listed in the line 1 table ........................ . Bullet Image

For Paperwork Reduction Act Notice, see the Instructions for Form 990.

Cat. No. 50055P

Schedule I (Form 990) Rev. 1-2025

Page 2

Part III

Grants and Other Assistance to Domestic Individuals. Complete if the organization answered "Yes" on Form 990, Part IV, line 22.
Part III can be duplicated if additional space is needed.

(a) Type of grant or assistance	(b) Number of recipients	(c) Amount of cash grant	(d) Amount of noncash assistance	(e) Method of valuation (book, FMV, appraisal, other)	(f) Description of noncash assistance

(1) IDWEEK TRAVEL GRANTS	3	2,400	N/A	N/A
(2) IDWEEK KASS AWARDS	27	20,250	N/A	N/A
(3) IDWEEK DOMESTIC AWARDS	231	210,700	N/A	N/A
(4) IDWEEK CASE PRESENTER AWARDS	9	8,900	N/A	N/A
(5) IDWEEK DIAGNOSTICS AWARDS	3	6,000	N/A	N/A
(6) IDWEEK PROGRAM COMMITTEE CHOICE AWARDS	4	10,000	N/A	N/A
(7) SOCIETY AWARDS	34	39,917	N/A	N/A
(7)

Part IV

Supplemental Information. Provide the information required in Part I, line 2; Part III, column (b); and any other additional information.

Return Reference	Explanation
PART I, LINE 2:	THE ORGANIZATION MAINTAINS COMPLETE RECORDS TO VERIFY GRANT AMOUNTS, CONFIRM GRANTEE ELIGIBILITY, AND DOCUMENT THE CRITERIA AND PROCESS USED TO EVALUATE AND AWARD ALL GRANTS AND ASSISTANCE. RECIPIENT ATTENDANCE, PARTICIPATION AND REPORTING ARE CONFIRMED BY STAFF PRIOR TO AWARD DISSEMINATION.

Schedule I (Form 990) Rev. 1-2025

Additional Data

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Schedule J
(Form 990)
(Rev. January 2025)

Department of the Treasury
Internal Revenue Service

Compensation Information

For certain Officers, Directors, Trustees, Key Employees, and Highest
Compensated Employees
medium right arrow graphic

Complete if the organization answered "Yes" on Form 990, Part IV, line 23.
medium right arrow graphic

Attach to Form 990.
medium right arrow graphic

Go to www.irs.gov/Form990 for instructions and the latest information.

OMB No. 1545-0047

Open to Public Inspection

Name of the organization

INFECTIOUS DISEASES SOCIETY OF AMERICA

Employer identification number

23-7045686

Part I

Questions Regarding Compensation

Yes

Check the appropiate box(es) if the organization provided any of the following to or for a person listed on Form
990, Part VII, Section A, line 1a. Complete Part III to provide any relevant information regarding these items.

First-class or charter travel Housing allowance or residence for personal use

Travel for companions Payments for business use of personal residence

Tax idemnification and gross-up payments Health or social club dues or initiation fees

Discretionary spending account Personal services (e.g., maid, chauffeur, chef)

If any of the boxes on Line 1a are checked, did the organization follow a written policy regarding payment or reimbursement or provision of all of the expenses described above? If "No," complete Part III to explain .....

Did the organization require substantiation prior to reimbursing or allowing expenses incurred by all
directors, trustees, officers, including the CEO/Executive Director, regarding the items checked on Line 1a? ....

Indicate which, if any, of the following the filing organization used to establish the compensation of the
organization's CEO/Executive Director. Check all that apply. Do not check any boxes for methods
used by a related organization to establish compensation of the CEO/Executive Director, but explain in Part III.

Compensation committee Written employment contract

Independent compensation consultant Compensation survey or study

Form 990 of other organizations Approval by the board or compensation committee

During the year, did any person listed on Form 990, Part VII, Section A, line 1a, with respect to the filing organization or a related organization:

Receive a severance payment or change-of-control payment? .............

Participate in, or receive payment from, a supplemental nonqualified retirement plan? .........

Yes

Participate in, or receive payment from, an equity-based compensation arrangement? .........

If "Yes" to any of lines 4a-c, list the persons and provide the applicable amounts for each item in Part III.

Only 501(c)(3), 501(c)(4), and 501(c)(29) organizations must complete lines 5-9.

For persons listed on Form 990, Part VII, Section A, line 1a, did the organization pay or accrue any
compensation contingent on the revenues of:

The organization? ....................

Any related organization? .......................

If "Yes," on line 5a or 5b, describe in Part III.

For persons listed on Form 990, Part VII, Section A, line 1a, did the organization pay or accrue any
compensation contingent on the net earnings of:

The organization? ..................

Any related organization? ......................

If "Yes," on line 6a or 6b, describe in Part III.

For persons listed on Form 990, Part VII, Section A, line 1a, did the organization provide any nonfixed
payments not described in lines 5 and 6? If "Yes," describe in Part III ............

Were any amounts reported on Form 990, Part VII, paid or accured pursuant to a contract that was
subject to the initial contract exception described in Regulations section 53.4958-4(a)(3)? If "Yes," describe
in Part III ..........................

If "Yes" on line 8, did the organization also follow the rebuttable presumption procedure described in Regulations section 53.4958-6(c)? .........................

For Paperwork Reduction Act Notice, see the Instructions for Form 990.

Cat. No. 50053T

Schedule J (Form 990) (Rev. 1-2025)

Page 2

Part II

Officers, Directors, Trustees, Key Employees, and Highest Compensated Employees. Use duplicate copies if additional space is needed.

For each individual whose compensation must be reported on Schedule J, report compensation from the organization on row (i) and from related organizations, described in the
instructions, on row (ii). Do not list any individuals that are not listed on Form 990, Part VII.
Note. The sum of columns (B)(i)-(iii) for each listed individual must equal the total amount of Form 990, Part VII, Section A, line 1a, applicable column (D) and (E) amounts for that individual.

(A) Name and Title		(B) Breakdown of W-2, 1099-MISC compensation, and/or 1099-NEC			(C) Retirement and other deferred compensation	(D) Nontaxable benefits	(E) Total of columns (B)(i)-(D)	(F) Compensation in column (B) reported as deferred on prior Form 990
(A) Name and Title		(i) Base compensation	(ii) Bonus & incentive compensation	(iii) Other reportable compensation	(C) Retirement and other deferred compensation	(D) Nontaxable benefits	(E) Total of columns (B)(i)-(D)
1CHRISTOPHER BUSKY CAE CHIEF EXECUTIVE OFFICER	(i) (ii)	571,733 ------------- 15,664	123,744 ------------- 0	15,664 ------------- 0	48,820 ------------- 1,338	35,207 ------------- 965	795,168 ------------- 17,967	0 ------------- 0
2TY JOHNSON CHIEF OPERATING OFFICER	(i) (ii)	221,862 ------------- 104,406	0 ------------- 0	104,406 ------------- 0	16,629 ------------- 7,825	10,513 ------------- 4,948	353,410 ------------- 117,179	0 ------------- 0
3DANA WOLLINS SVP, STRATEGY	(i) (ii)	284,741 ------------- 0	0 ------------- 0	0 ------------- 0	22,181 ------------- 0	37,735 ------------- 0	344,657 ------------- 0	0 ------------- 0
4AMANDA JEZEK SVP, POLICY & GOVERNMENT RELATIONS	(i) (ii)	273,303 ------------- 0	0 ------------- 0	0 ------------- 0	21,000 ------------- 0	35,806 ------------- 0	330,109 ------------- 0	0 ------------- 0
5SANDRA VURA HARWOOD VP, MEETINGS & EDUCATION	(i) (ii)	262,084 ------------- 0	0 ------------- 0	0 ------------- 0	17,983 ------------- 0	26,685 ------------- 0	306,752 ------------- 0	0 ------------- 0
6FELICITY CLANCY VP, MARKETING & MEMBERSHIP	(i) (ii)	242,469 ------------- 0	0 ------------- 0	0 ------------- 0	16,741 ------------- 0	38,456 ------------- 0	297,666 ------------- 0	0 ------------- 0
7ANDREA WEDDLE ED, HIVMA	(i) (ii)	232,663 ------------- 6,374	0 ------------- 0	6,374 ------------- 0	17,702 ------------- 485	14,949 ------------- 410	271,688 ------------- 7,269	0 ------------- 0
8SALANDRA THOMAS VP, TALENT & ORG. DEVELOPMENT	(i) (ii)	222,290 ------------- 6,090	0 ------------- 0	6,090 ------------- 0	17,236 ------------- 472	27,712 ------------- 759	273,328 ------------- 7,321	0 ------------- 0
9BARTON GROH VP, FINANCE & ADMINISTRATION	(i) (ii)	212,025 ------------- 11,945	0 ------------- 0	11,945 ------------- 0	16,540 ------------- 932	28,622 ------------- 1,612	269,132 ------------- 14,489	0 ------------- 0
10RACHEL SHNEKENDORF SENIOR DIRECTOR, EDUCATION	(i) (ii)	179,665 ------------- 0	0 ------------- 0	0 ------------- 0	13,574 ------------- 0	13,381 ------------- 0	206,620 ------------- 0	0 ------------- 0
11JENNIFER MORALES SENIOR DIRECTOR, PR & MARKETING	(i) (ii)	177,935 ------------- 0	0 ------------- 0	0 ------------- 0	13,631 ------------- 0	15,862 ------------- 0	207,428 ------------- 0	0 ------------- 0
12GAYLE LEVY HARTMAN SENIOR DIRECTOR, DIGITAL & CONTENT S	(i) (ii)	169,138 ------------- 0	0 ------------- 0	0 ------------- 0	13,675 ------------- 0	39,844 ------------- 0	222,657 ------------- 0	0 ------------- 0

Schedule J (Form 990) (Rev. 1-2025)

Page 3

Part III

Supplemental Information

Provide the information, explanation, or descriptions required for Part I, lines 1a, 1b, 3, 4a, 4b, 4c, 5a, 5b, 6a, 6b, 7, and 8, and for Part II. Also complete this part for any additional information.

Return Reference

Explanation

PART I, LINE 3

CEO COMPENSATION: THE IDSA BOARD HAS ENTERED INTO AN EMPLOYMENT CONTRACT WITH ITS CHIEF EXECUTIVE OFFICER. THE COMPENSATION DETAILED IN THE CONTRACT AND SUBSEQUENT RAISES DURING THE CONTRACT TERM ARE BASED ON A REVIEW OF 990'S FROM OTHER SIMILAR NON-PROFIT ORGANIZATIONS, A COMPENSATION STUDY WRITTEN EMPLOYMENT CONTRACTS OF OTHER SIMILARILY SITUATED EXCECUTIVES, AND ANNUAL APPROVAL BY THE EXECUTIVE COMMITTEE.

PART I, LINE 4B

THE ORGANIZATION CONTRIBUTED $29,232 TO 457 PLANS FOR THE BENEFIT OF THE CEO.

Schedule J (Form 990) (Rev. 1-2025)

Additional Data

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SCHEDULE O
(Form 990)
(Rev. January 2025)
Department of the Treasury
Internal Revenue Service

Supplemental Information to Form 990 or 990-EZ

Complete to provide information for responses to specific questions on
Form 990 or 990-EZ or to provide any additional information.
Attach to Form 990 or 990-EZ.
Go to www.irs.gov/Form990 for instructions and the latest information.

OMB No. 1545-0047

Open to Public
Inspection

Name of the organization

INFECTIOUS DISEASES SOCIETY OF AMERICA

Employer identification number

23-7045686

Return Reference	Explanation
FORM 990, PART I, LINE 19, EXPLANATION OF DEFICIT:	THE ORGANIZATION REPORTED AN OPERATING DEFICIT OF APPROXIMATELY $7 MILLION FOR THE FISCAL YEAR. THIS WAS A PLANNED AND BOARD-APPROVED INVESTMENT IN STRATEGIC INITIATIVES DESIGNED TO STRENGTHEN THE ORGANIZATION'S LONG-TERM IMPACT, MEMBER VALUE, AND MISSION DELIVERY. THE DEFICIT REFLECTS DELIBERATE SPENDING IN KEY AREAS, INCLUDING CONTINUED MODERNIZATION OF SYSTEMS AND INFRASTRUCTURE, EXPANDED MEMBER AND PUBLIC HEALTH PROGRAMS, AND INITIATIVES THAT REINFORCE THE INFECTIOUS DISEASES SPECIALTY'S LEADERSHIP AND VISIBILITY. THESE INVESTMENTS WERE MADE AS PART OF A MULTI-YEAR PLAN TO BUILD CAPACITY AND POSITION THE ORGANIZATION FOR SUSTAINED GROWTH AND EFFECTIVENESS. THE ORGANIZATION MAINTAINS ADEQUATE RESERVES TO FULLY COVER THIS PLANNED DEFICIT AND CONTINUES TO OPERATE WITH A STRONG FINANCIAL FOUNDATION. MEASURES ARE IN PLACE TO REDUCE FUTURE DEFICITS AND REBALANCE THE BUDGET OVER THE NEXT SEVERAL YEARS AS THE BENEFITS OF THESE STRATEGIC INVESTMENTS ARE REALIZED.
FORM 990, PART VI, SECTION A, LINE 1A	THE EXECUTIVE COMMITTEE OF THE BOARD OF DIRECTORS CONSISTS OF THE PRESIDENT, VP, PRESIDENT-ELECT, PAST PRESIDENT, SECRETARY, & TREASURER - ARE RESPONSIBLE FOR THE MANAGEMENT AND DIRECTION OF THE ORGANIZATION AND CONDUCT THE AFFAIRS OF THE ORGANIZATION DURING INTERVALS BETWEEN MEETINGS OF THE BOD, FOR ASSISTING THE PRESIDENT IN THE OVERSIGHT OF THE ADMINISTRATIVE INFRASTRUCTURE OF THE SOCIETY, FOR SERVICE AS AN ADVISORY BODY TO THE PRESIDENT, AND FOR REPORTING ALL OF ITS ACTIONS TO THE BOD FOR REVIEW AND/OR APPROVAL.
FORM 990, PART VI, SECTION A, LINE 6	THE CATEGORIES OF MEMBERSHIP INCLUDE: MEMBER, FELLOW, MEMBER-IN-TRAINING, ASSOCIATE MEMBER, AND MEDICAL STUDENT OR RESIDENT MEMBER. SOME MEMBERS OR FELLOWS MAY BE FURTHER CLASSIFIED AS HONORARY OR EMERITUS.
FORM 990, PART VI, SECTION A, LINE 7A	ALL MEMBERS OF THE BOARD OF DIRECTORS ARE SELECTED BY A LEADERSHIP DEVELOPMENT COMMITTEE OF MEMBERS BY REVIEWING CLINICAL EXPERIENCE, SERVICE WITHIN IDSA GOVERNANCE STRUCTURE AND APPLYING PRINCIPLES OF INCLUSION, DIVERSITY, ACCESS AND EQUITY. THE SLATE OF NEW BOARD MEMBERS IS THEN APPROVED BY THE BOARD AND ULTIMATELY BY THE FULL MEMBERSHIP. MEMBERS, MEMBERS-IN-TRAINING AND FELLOWS ARE FULL VOTING MEMBERS OF THE SOCIETY.
FORM 990, PART VI, SECTION A, LINE 7B	THE BYLAWS MAY BE AMENDED BY THE AFFIRMATIVE VOTE OF AT LEAST TWO-THIRDS (2/3) OF DIRECTORS PRESENT AND VOTING AT ANY REGULAR OR SPECIAL MEETING OF THE BOARD OF DIRECTORS. UPON THE WRITTEN REQUEST OF AT LEAST 10% OF THE VOTING MEMBERS, AN AMENDMENT MAY BE SUBMITTED TO THE BOARD OF DIRECTORS FOR CONSIDERATION AND VOTE AT THE NEXT BOARD OF DIRECTORS' MEETING. IF THE BOARD OF DIRECTORS DECIDE NOT TO PASS ANY MEMBER-PROPOSED AMENDMENT, THE BOARD OF DIRECTORS WILL SUBMIT THE MEMBER-PROPOSED AMENDMENT TO THE FULL MEMBERSHIP AT THE NEXT MEETING OF THE MEMBERS, AND SUCH MEMBER-PROPOSED AMENDMENT MAY BE ADOPTED BY THE AFFIRMATIVE VOTE OF AT LEAST TWO-THIRDS OF THE VOTING MEMBERS OF THE CORPORATION, PRESENT AND VOTING AT ANY REGULAR OR SPECIAL MEETING OF SUCH MEMBERS, IF NOTICE OF THE PROPOSED AMENDMENT IS CONTAINED IN THE NOTICE OF THE MEETING; OR BY AFFIRMATIVE VOTE OF AT LEAST TWO-THIRDS OF THOSE VOTING BY MAIL BALLOT. BYLAWS AMENDMENTS APPROVED BY THE BOARD OF DIRECTORS SHALL BE COMMUNICATED TO THE MEMBERS WITHIN SIXTY (60) DAYS OF APPROVAL.
FORM 990, PART VI, SECTION B, LINE 11B	A COPY OF THE FORM 990 IS ALSO PROVIDED TO EACH MEMBER OF THE BOARD OF DIRECTORS BEFORE IT IS FILED.
FORM 990, PART VI, SECTION B, LINE 12C	IDSA REQUIRES ALL BOARD AND COMMITTEE MEMBERS, AS WELL AS KEY EMPLOYEES, TO SUBMIT A CONFLICT OF INTEREST (COI) FORM ANNUALLY. ANY INDIVIDUAL WITH A POTENTIAL CONFLICT MUST RECUSE THEMSELVES FROM RELATED DISCUSSIONS OR VOTES. STAFF MEMBERS WITH CONFLICTS ARE PROHIBITED FROM WORKING ON PROJECTS INVOLVING THE AFFECTED AREA OR COMPANY. THE COI AND ETHICS COMMITTEE OVERSEES COMPLIANCE WITH THIS POLICY. STAFF DISCLOSURES ARE REVIEWED BY THE CEO, WHO DETERMINES APPROPRIATE ACTION. THE CEO'S COI REPORT IS REVIEWED BY THE EXECUTIVE COMMITTEE, WHICH EVALUATES ANY POTENTIAL CONFLICTS INVOLVING THE CEO.
FORM 990, PART VI, SECTION B, LINE 15A	CEO COMPENSATION: (A) REVIEW AND APPROVAL IS DONE BY THE EXECUTIVE COMMITTEE, MEETING IN EXECUTIVE SESSION, (B) COMPARABILITY DATA IS OBTAINED FROM AMERICAN SOCIETY OF ASSOCIATION EXECUTIVES (ASAE) AND USED FOR DETERMINING COMPENSATION, (C) THERE ARE NO MINUTES OF THE EXECUTIVE SESSION, SO NO WRITTEN DELIBERATION. WRITTEN DECISION IS FORWARDED TO THE VP OF FINANCE AND ADMINISTRATION AND VP, TALENT & ORGANIZATIONAL DEVELOPMENT TO PLACE IN PERSONNEL FILE AND APPLIED TO PAYROLL. THESE PROCESSES WERE LAST COMPLETED IN 2024. FORM 990, PART VI, SECTION B, LINE 15B: EMPLOYEE COMPENSATION: COMPENSATION REVIEWED BY THE INDIVIDUAL'S SUPERVISOR AND APPROVED BY THE CEO. THE BOARD APPROVES THE OVERALL SALARY BUDGET BUT NOT INDIVIDUAL STAFF SALARIES, EXCEPT FOR THE CEO. COMPENSATION DECISIONS ARE INFORMED BY COMPARABILITY DATA OBTAINED FROM ASAE AND A COMPENSATION STUDY DONE BY A THIRD-PARTY CONSULTANT IN 2024. EMPLOYEE PERFORMANCE REVIEWS ARE DOCUMENTED, SIGNED BY BOTH THE SUPERVISOR AND EMPLOYEE, AND USED TO SUPPORT ANY RECOMMENDED SALARY ADJUSTMENTS. THESE PROCESSES WERE LAST COMPLETED IN 2024 FOR ALL STAFF.
FORM 990, PART VI, SECTION C, LINE 19	THE GOVERNING DOCUMENTS ARE AVAILABLE ON THE SOCIETY'S WEBSITE. UPON REQUEST, THEY ARE MADE AVAILABLE BASED ON BUSINESS NEED. THE AUDITED FINANCIAL STATEMENTS ARE AVAILABLE ON THE SOCIETY'S WEBSITE. THE CONFLICT OF INTEREST POLICY IS AVAILABLE ON OUR INTERNAL EMPLOYEE INTRANET AND DISTRIBUTED AS NEEDED.
FORM 990, PART IX, LINE 11G	PROGRAM CONSULTING 7,266,053. ALTERNATIVE INVEST FEES 18,537. OTHER PROFESSIONAL FEES 659,899.

For Paperwork Reduction Act Notice, see the Instructions for Form 990 or 990-EZ.

Cat. No. 51056K

Schedule O (Form 990) (Rev. 1-2025)

Additional Data

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SCHEDULE R
(Form 990)
(Rev. January 2025)

Department of the Treasury
Internal Revenue Service

Related Organizations and Unrelated Partnerships

Complete if the organization answered "Yes" on Form 990, Part IV, line 33, 34, 35b, 36, or 37.
Attach to Form 990.
Go to www.irs.gov/Form990 for instructions and the latest information.

OMB No. 1545-0047

Open to Public Inspection

Name of the organization

INFECTIOUS DISEASES SOCIETY OF AMERICA

Employer identification number

23-7045686

Part I

Identification of Disregarded Entities. Complete if the organization answered "Yes" on Form 990, Part IV, line 33.

(a) Name, address, and EIN (if applicable) of disregarded entity	(b) Primary activity	(c) Legal domicile (state or foreign country)	(d) Total income	(e) End-of-year assets	(f) Direct controlling entity

Part II

Identification of Related Tax-Exempt Organizations. Complete if the organization answered "Yes" on Form 990, Part IV, line 34 because it had one or more related tax-exempt organizations during the tax year.

(a) Name, address, and EIN of related organization	(b) Primary activity	(c) Legal domicile (state or foreign country)	(d) Exempt Code section	(e) Public charity status (if section 501(c)(3))	(f) Direct controlling entity	(g) Section 512(b)(13) controlled entity?
(a) Name, address, and EIN of related organization	(b) Primary activity	(c) Legal domicile (state or foreign country)	(d) Exempt Code section	(e) Public charity status (if section 501(c)(3))	(f) Direct controlling entity	Yes	No
(1)IDSA EDUCATION AND RESEARCH FOUNDATION 4040 WILSON BLVD STE 300 ARLINGTON,VA22203 31-1765388	FUNDING INITIATIVES DEDICATED TO SUPPORTING IDSA'S MISSION WORLDWIDE	VA	501(C)(3)	LINE 12A, I	INFECTIOUS DISEASES SOCIETY OF AMERICA	Yes

For Paperwork Reduction Act Notice, see the Instructions for Form 990.

Cat. No. 50135Y

Schedule R (Form 990) (Rev. 1-2025)

Page 2

Part III

Identification of Related Organizations Taxable as a Partnership. Complete if the organization answered "Yes" on Form 990, Part IV, line 34, because it had one or more related organizations treated as a partnership during the tax year.

(a) Name, address, and EIN of related organization	(b) Primary activity	(c) Legal domicile (state or foreign country)	(d) Direct controlling entity	(f) Share of total income	(g) Share of end-of-year assets	(h) Disproprtionate allocations?		(i) Code V-UBI amount in box 20 of Schedule K-1 (Form 1065)	(j) General or managing partner?		(k) Percentage ownership
(a) Name, address, and EIN of related organization	(b) Primary activity	(c) Legal domicile (state or foreign country)	(d) Direct controlling entity	(f) Share of total income	(g) Share of end-of-year assets	Yes	No	(i) Code V-UBI amount in box 20 of Schedule K-1 (Form 1065)	Yes	No	(k) Percentage ownership

Part IV

Identification of Related Organizations Taxable as a Corporation or Trust. Complete if the organization answered "Yes" on Form 990, Part IV, line 34 because it had one or more related organizations treated as a corporation or trust during the tax year.

(a) Name, address, and EIN of related organization	(b) Primary activity	(c) Legal domicile (state or foreign country)	(d) Direct controlling entity	(e) Type of entity (C corp, S corp, or trust)	(f) Share of total income	(g) Share of end-of-year assets	(h) Percentage ownership	(i) Section 512(b)(13) controlled entity?
(a) Name, address, and EIN of related organization	(b) Primary activity	(c) Legal domicile (state or foreign country)	(d) Direct controlling entity	(e) Type of entity (C corp, S corp, or trust)	(f) Share of total income	(g) Share of end-of-year assets	(h) Percentage ownership	Yes	No

Schedule R (Form 990) (Rev. 1-2025)

Page 3

Part V

Transactions With Related Organizations. Complete if the organization answered "Yes" on Form 990, Part IV, line 34, 35b, or 36.

Note. Complete line 1 if any entity is listed in Parts II, III, or IV of this schedule.

Yes

1 During the tax year, did the orgranization engage in any of the following transactions with one or more related organizations listed in Parts II-IV?

a Receipt of (i) interest, (ii) annuities, (iii) royalties, or (iv) rent from a controlled entity .....................

b Gift, grant, or capital contribution to related organization(s) ............................

Yes

c Gift, grant, or capital contribution from related organization(s) ............................

d Loans or loan guarantees to or for related organization(s) ............................

e Loans or loan guarantees by related organization(s) ............................

f Dividends from related organization(s) ............................

g Sale of assets to related organization(s) ............................

h Purchase of assets from related organization(s) ............................

i Exchange of assets with related organization(s) ............................

j Lease of facilities, equipment, or other assets to related organization(s) .......................

k Lease of facilities, equipment, or other assets from related organization(s) ......................

l Performance of services or membership or fundraising solicitations for related organization(s) .....................

m Performance of services or membership or fundraising solicitations by related organization(s) .................

n Sharing of facilities, equipment, mailing lists, or other assets with related organization(s) ...................

Yes

o Sharing of paid employees with related organization(s) ............................

Yes

p Reimbursement paid to related organization(s) for expenses ............................

q Reimbursement paid by related organization(s) for expenses ............................

r Other transfer of cash or property to related organization(s) ............................

s Other transfer of cash or property from related organization(s) ............................

If the answer to any of the above is "Yes," see the instructions for information on who must complete this line, including covered relationships and transaction thresholds.

(a) Name of related organization	(b) Transaction type (a-s)	(c) Amount involved	(d) Method of determining amount involved
(1) IDSA EDUCATION AND RESEARCH FOUNDATION	B	250,000	COST
(2) IDSA EDUCATION AND RESEARCH FOUNDATION	O	856,638	COST
(3) IDSA EDUCATION AND RESEARCH FOUNDATION	N	150,678	COST

Schedule R (Form 990) (Rev. 1-2025)

Page 4

Part VI

Unrelated Organizations Taxable as a Partnership. Complete if the organization answered "Yes" on Form 990, Part IV, line 37.

Provide the following information for each entity taxed as a partnership through which the organization conducted more than five percent of its activities (measured by total assets or gross revenue) that was not a related organization. See instructions regarding exclusion for certain investment partnerships.

(a) Name, address, and EIN of entity	(b) Primary activity	(c) Legal domicile (state or foreign country)	(e) Are all partners section 501(c)(3) organizations?		(f) Share of total income	(g) Share of end-of-year assets	(h) Disproprtionate allocations?		(i) Code V-UBI amount in box 20 of Schedule K-1 (Form 1065)	(j) General or managing partner?		(k) Percentage ownership
(a) Name, address, and EIN of entity	(b) Primary activity	(c) Legal domicile (state or foreign country)	Yes	No	(f) Share of total income	(g) Share of end-of-year assets	Yes	No	(i) Code V-UBI amount in box 20 of Schedule K-1 (Form 1065)	Yes	No	(k) Percentage ownership

Schedule R (Form 990) (Rev. 1-2025)

Page 5

Part VII

Supplemental Information

Provide additional information for responses to questions on Schedule R. See instructions.

Return Reference	Explanation

Schedule R (Form 990) (Rev. 1-2025)

Additional Data

Software ID:
Software Version:

1	Was the organization a U.S. transferor of property to a foreign corporation during the tax year? If "Yes," the organization may be required to file Form 926, Return by a U.S. Transferor of Property to a Foreign Corporation (see Instructions for Form 926). . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	Yes	No
2	Did the organization have an interest in a foreign trust during the tax year? If "Yes," the organization may be required to separately file Form 3520, Annual Return to Report Transactions with Foreign Trusts and Receipt of Certain Foreign Gifts, and/or Form 3520-A, Annual Information Return of Foreign Trust With a U.S. Owner (see Instructions for Forms 3520 and 3520-A; don't file with Form 990). . . . . . . . . . . . . . . . . . . . . . . .	Yes	No
3	Did the organization have an ownership interest in a foreign corporation during the tax year? If "Yes," the organization may be required to file Form 5471, Information Return of U.S. Persons with Respect to Certain Foreign Corporations. (see Instructions for Form 5471). . . . . . . . . . . . . . . . . . . . . . . . . . . .	Yes	No
4	Was the organization a direct or indirect shareholder of a passive foreign investment company or a qualified electing fund during the tax year? If “Yes,” the organization may be required to file Form 8621, Information Return by a Shareholder of a Passive Foreign Investment Company or Qualified Electing Fund. (see Instructions for Form 8621) .	Yes	No
5	Did the organization have an ownership interest in a foreign partnership during the tax year? If "Yes," the organization may be required to file Form 8865, Return of U.S. Persons with Respect to Certain Foreign Partnerships (see Instructions for Form 8865). . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	Yes	No
6	Did the organization have any operations in or related to any boycotting countries during the tax year? If "Yes," the organization may be required to separately file Form 5713, International Boycott Report (see Instructions for Form 5713; don't file with Form 990).. . . . . . . . . . . . . . . . . . . . . . . . . . . .	Yes	No