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
2023
Open to Public Inspection
A For the 2023 calendar year, or tax year beginning 01-01-2023 , and ending 12-31-2023
BCheck if applicable:
CName of organization
SOCIETY OF INTERVENTIONAL ONCOLOGY INC
 
 
Doing business as
 
 
Number and street (or P.O. box if mail is not delivered to street address)
2001 K STREET NW 300
 
Room/suite
City or town, state or province, country, and ZIP or foreign postal code
WASHINGTON, DC20006
D Employer identification number

41-2161648
E Telephone number

G Gross receipts $ 3,839,585
F Name and address of principal officer:
JENA EBERLY STACK
2001 K STREET NW 300
WASHINGTON,DC20006
I
Tax-exempt status: ( 6 ) (insert no.) or
J
Website:
WWW.SIO-CENTRAL.ORG
H(a)
Is this a group return for
subordinates?
H(b)
Are all subordinates
included?
If "No," attach a list. See instructions.
H(c)
Group exemption number  
K Form of organization:  
L Year of formation: 2005
M State of legal domicile: MA
Part I
Summary
Activities & Governance 1 Briefly describe the organization’s mission or most significant activities: TO ADVANCE INTERVENTIONAL ONCOLOGY BY DEVELOPING EVIDENCE SUPPORTING IO THERAPIES, EDUCATING IO PRACTITIONERS, AND IMPROVING PATIENT ACCESS TO IO THERAPIES.
2 Check this box
3 Number of voting members of the governing body (Part VI, line 1a) ........ 3 10
4 Number of independent voting members of the governing body (Part VI, line 1b) ..... 4 10
5 Total number of individuals employed in calendar year 2023 (Part V, line 2a) ...... 5 0
6 Total number of volunteers (estimate if necessary) ............. 6 11
7a Total unrelated business revenue from Part VIII, column (C), line 12 ........ 7a 0
b Net unrelated business taxable income from Form 990-T, Part I, line 11 ......... 7b 0
Revenues Prior Year Current Year
8 Contributions and grants (Part VIII, line 1h) ......... 316,500 1,164,900
9 Program service revenue (Part VIII, line 2g) ......... 1,742,070 2,493,582
10 Investment income (Part VIII, column (A), lines 3, 4, and 7d ) .... 21,237 67,809
11 Other revenue (Part VIII, column (A), lines 5, 6d, 8c, 9c, 10c, and 11e) 0 14,096
12 Total revenue—add lines 8 through 11 (must equal Part VIII, column (A), line 12) 2,079,807 3,740,387
Expenses; 13 Grants and similar amounts paid (Part IX, column (A), lines 1–3 )... 30,578 221,560
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) 0 0
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).... 2,149,448 2,667,513
18 Total expenses. Add lines 13–17 (must equal Part IX, column (A), line 25) 2,180,026 2,889,073
19 Revenue less expenses. Subtract line 18 from line 12....... -100,219 851,314
Net Assets or Fund Balances; Beginning of Current Year End of Year
20 Total assets (Part X, line 16)............. 7,644,301 10,050,985
21 Total liabilities (Part X, line 26)............. 1,106,654 2,564,276
22 Net assets or fund balances. Subtract line 21 from line 20..... 6,537,647 7,486,709
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
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. ..........
For Paperwork Reduction Act Notice, see the separate instructions.
Cat. No. 11282Y Form 990 (2023)
Form 990 (2023)
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..............
1
Briefly describe the organization’s mission: TO ADVANCE INTERVENTIONAL ONCOLOGY AS THE FOURTH PILLAR OF CANCER THERAPY ALONGSIDE MEDICAL, SURGICAL, AND RADIATION ONCOLOGY WORLDWIDE.
2
Did the organization undertake any significant program services during the year which were not listed on
the prior Form 990 or 990-EZ? .....................
If "Yes," describe these new services on Schedule O.
3
Did the organization cease conducting, or make significant changes in how it conducts, any program
services? ...........................
If "Yes," describe these changes on Schedule O.
4
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 $   )
ANNUAL MEETING - SIO HOLDS AN ANNUAL MULTIDISCIPLINARY SCIENTIFIC MEETING, WITH EXHIBITS ON INTERVENTIONAL ONCOLOGY ISSUES. THE MEETING PRESENTS CURRENT INFORMATION ON RESEARCH, NEW PRODUCTS, AND NEW TECHNIQUES IN THE INTERVENTIONAL ONCOLOGY FIELD.
4b (Code:   ) (Expenses $   including grants of $   ) (Revenue $   )
RESEARCH GRANTS - SIO FUNDS SEVERAL RESEARCH GRANTS SINCE 2017 THAT ARE ONGOING PROJECTS. THESE GRANTS ARE DESIGNED TO FUND RESEARCH EVALUATING AND ADVANCING THE INTERACTIONS BETWEEN TWO PREMIER INTERVENTIONAL ONCOLOGIC THERAPIES AND ADVANCING INTERVENTIONAL ONCOLOGY WORLDWIDE. OTHER GRANTS INCLUDE GRANTS FOR INTERVENTIONAL ONCOLOGY/IMMUNO-ONCOLOGY.
4c (Code:   ) (Expenses $   including grants of $   ) (Revenue $   )
OTHER MEETINGS - SIO REGULARLY HOLDS ADDITIONAL MASTER CLASSES UNDER THE IO UNIVERSITY FOR THE PURPOSE OF PROVIDING TRAINING IN INTERVENTIONAL ONCOLOGY RELEVANT TOPICS.
(Code:   ) (Expenses $   including grants of $   ) (Revenue $   )
PUBLICATIONS - SIO PUBLISHES VARIOUS RESOURCES RELATED TO INTERVENTIONAL ONCOLOGY INCLUDING IO PERSPECTIVES, IO INSIGHTS, AND THE INSIDER, A MONTHLY PUBLICATIONS DIGEST.
(Code:   ) (Expenses $   including grants of $   ) (Revenue $   )
ONLINE COMMUNITY - THE SOCIETY OF INTERVENTIONAL ONCOLOGY (SIO) PRESENTS AN INTERVENTIONAL ONCOLOGY (IO) ONLINE COMMUNITY DESIGNED TO ESTABLISH IO CANCER THERAPY AS THE 4TH PILLAR OF CANCER THERAPYALONGSIDE MEDICAL, SURGICAL, AND RADIATION ONCOLOGY WORLDWIDE.
4d Other program services (Describe in Schedule O.)
(Expenses $   including grants of $   ) (Revenue $   )
4e Total program service expenses  
Form 990 (2023)
Form 990 (2023)
Page 3
Part IV
Checklist of Required Schedules
Yes
No
1
Is the organization described in section 501(c)(3) or 4947(a)(1) (other than a private foundation)? If "Yes," complete Schedule A.....................
1
 
No
2
Is the organization required to complete Schedule B, Schedule of Contributors? See instructions. Click to see attachment
List of Attached Documents:
// Content
...
2
Yes
 
3
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 IClick to see attachment
List of Attached Documents:
// Content
.............
3
 
No
4
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.........
4
 
 
5
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 IIIClick to see attachment
List of Attached Documents:
// Content
..
5
Yes
 
6
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 IClick to see attachment
List of Attached Documents:
// Content
.........................
6
 
No
7
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 IIClick to see attachment
List of Attached Documents:
// Content
....
7
 
No
8
Did the organization maintain collections of works of art, historical treasures, or other similar assets? If "Yes,"
complete Schedule D, Part IIIClick to see attachment
List of Attached Documents:
// Content
..............
8
 
No
9
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 IVClick to see attachment
List of Attached Documents:
// Content
..............
9
 
No
10
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......
10
 
No
11
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.
a
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
 
No
b
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 VIIClick to see attachment
List of Attached Documents:
// Content
.......
11b
 
No
c
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 VIIIClick to see attachment
List of Attached Documents:
// Content
.......
11c
 
No
d
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 IXClick to see attachment
List of Attached Documents:
// Content
............
11d
 
No
e
Did the organization report an amount for other liabilities in Part X, line 25? If "Yes," complete Schedule D, Part XClick to see attachment
List of Attached Documents:
// Content
11e
 
No
f
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 XClick to see attachment
List of Attached Documents:
// Content
11f
Yes
 
12a
Did the organization obtain separate, independent audited financial statements for the tax year? If "Yes," complete
Schedule D, Parts XI and XIIClick to see attachment
List of Attached Documents:
// Content
......................
12a
Yes
 
b
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
 
No
13
Is the organization a school described in section 170(b)(1)(A)(ii)? If "Yes," complete Schedule E
13
 
No
14a
Did the organization maintain an office, employees, or agents outside of the United States? .....
14a
 
No
b
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.........
14b
 
No
15
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.....
15
 
No
16
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...
16
 
No
17
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. ....
17
 
No
18
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............
18
 
No
19
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...................
19
 
No
20a
Did the organization operate one or more hospital facilities? If "Yes," complete Schedule H....
20a
 
No
b
If "Yes" to line 20a, did the organization attach a copy of its audited financial statements to this return?
20b
 
 
21
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
21
 
No
Form 990 (2023)
Form 990 (2023)
Page 4
Part IV
Checklist of Required Schedules (continued)
Yes
No
22
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
22
Yes
 
23
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.......................
23
 
No
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
 
No
b
Did the organization invest any proceeds of tax-exempt bonds beyond a temporary period exception?...
24b
 
 
c
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
 
 
d
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
 
 
b
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
 
 
26
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...........
26
 
No
27
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.........................
27
 
No
28
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
A current or former officer, director, trustee, key employee, creator or founder, or substantial contributor? If "Yes," complete Schedule L, Part IV......................
28a
 
No
b
A family member of any individual described in line 28a? If "Yes," complete Schedule L, Part IV.....
28b
 
No
c
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
 
No
29
Did the organization receive more than $25,000 in non-cash contributions? If "Yes," complete Schedule M..
29
 
No
30
Did the organization receive contributions of art, historical treasures, or other similar assets, or qualified conservation contributions? If "Yes," complete Schedule M .................
30
 
No
31
Did the organization liquidate, terminate, or dissolve and cease operations? If "Yes," complete Schedule N, Part I
31
 
No
32
Did the organization sell, exchange, dispose of, or transfer more than 25% of its net assets? If "Yes," complete Schedule N, Part II........................
32
 
No
33
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............
33
 
No
34
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.........................
34
 
No
35a
Did the organization have a controlled entity within the meaning of section 512(b)(13)?
35a
 
No
b
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 ...
35b
 
 
36
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.............
36
 
 
37
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
37
 
No
38
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. ............
38
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
No
1a
Enter the number reported in box 3 of Form 1096. Enter -0- if not applicable ..
1a
84
b
Enter the number of Forms W-2G included on line 1a. Enter -0- if not applicable .
1b
0
c
Did the organization comply with backup withholding rules for reportable payments to vendors and reportable gaming (gambling) winnings to prize winners? ..................
1c
Yes
 
Form 990 (2023)
Form 990 (2023)
Page 5
Part V
Statements Regarding Other IRS Filings and Tax Compliance (continued)
2a
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 ..................
2a
0
b
If at least one is reported on line 2a, did the organization file all required federal employment tax returns?
2b
 
 
3a
Did the organization have unrelated business gross income of $1,000 or more during the year?...
3a
 
No
b
If “Yes,” has it filed a Form 990-T for this year? If “No” to line 3b, provide an explanation in Schedule O...
3b
 
 
4a
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)? ..
4a
 
No
b
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).
5a
Was the organization a party to a prohibited tax shelter transaction at any time during the tax year? ..
5a
 
No
b
Did any taxable party notify the organization that it was or is a party to a prohibited tax shelter transaction?
5b
 
No
c
If "Yes," to line 5a or 5b, did the organization file Form 8886-T? ............
5c
 
 
6a
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? ...
6a
 
No
b
If "Yes," did the organization include with every solicitation an express statement that such contributions or gifts were not tax deductible? ......................
6b
 
 
7
Organizations that may receive deductible contributions under section 170(c).
a
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? ....................
7a
 
 
b
If "Yes," did the organization notify the donor of the value of the goods or services provided? .....
7b
 
 
c
Did the organization sell, exchange, or otherwise dispose of tangible personal property for which it was required to file Form 8282? .........................
7c
 
 
d
If "Yes," indicate the number of Forms 8282 filed during the year ....
7d
 
e
Did the organization receive any funds, directly or indirectly, to pay premiums on a personal benefit contract?
7e
 
 
f
Did the organization, during the year, pay premiums, directly or indirectly, on a personal benefit contract? ..
7f
 
 
g
If the organization received a contribution of qualified intellectual property, did the organization file Form 8899 as required? ......................
7g
 
 
h
If the organization received a contribution of cars, boats, airplanes, or other vehicles, did the organization file a Form 1098-C? ..........................
7h
 
 
8
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? ........
8
 
 
9
Sponsoring organizations maintaining donor advised funds.
a
Did the sponsoring organization make any taxable distributions under section 4966?........
9a
 
 
b
Did the sponsoring organization make a distribution to a donor, donor advisor, or related person?...
9b
 
 
10
Section 501(c)(7) organizations. Enter:
a
Initiation fees and capital contributions included on Part VIII, line 12 ...
10a
 
b
Gross receipts, included on Form 990, Part VIII, line 12, for public use of club facilities
10b
 
11
Section 501(c)(12) organizations. Enter:
a
Gross income from members or shareholders .........
11a
 
b
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
 
 
b
If "Yes," enter the amount of tax-exempt interest received or accrued during the year.
12b
 
13
Section 501(c)(29) qualified nonprofit health insurance issuers.
a
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
 
 
b
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
 
c
Enter the amount of reserves on hand ............
13c
 
14a
Did the organization receive any payments for indoor tanning services during the tax year?.....
14a
 
No
b
If "Yes," has it filed a Form 720 to report these payments? If "No," provide an explanation in Schedule O..
14b
 
 
15
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.
15
 
No
16
Is the organization an educational institution subject to the section 4968 excise tax on net investment income? ..
If "Yes," complete Form 4720, Schedule O.
16
 
No
17
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.
17
 
 
Form 990 (2023)
Form 990 (2023)
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
No
1a
Enter the number of voting members of the governing body at the end of the tax year
1a
10
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.
b
Enter the number of voting members included in line 1a, above, who are independent
1b
10
2
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? .................
2
 
No
3
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? .
3
Yes
 
4
Did the organization make any significant changes to its governing documents since the prior Form 990 was filed? .
4
 
No
5
Did the organization become aware during the year of a significant diversion of the organization’s assets? .
5
 
No
6
Did the organization have members or stockholders? ................
6
Yes
 
7a
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? ....................
7a
Yes
 
b
Are any governance decisions of the organization reserved to (or subject to approval by) members, stockholders, or persons other than the governing body? ...................
7b
 
No
8
Did the organization contemporaneously document the meetings held or written actions undertaken during the year by the following:
a
The governing body? .......................
8a
Yes
 
b
Each committee with authority to act on behalf of the governing body? ............
8b
Yes
 
9
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.......
9
 
No
Section B. Policies (This Section B requests information about policies not required by the Internal Revenue Code.)
Yes
No
10a
Did the organization have local chapters, branches, or affiliates? ............
10a
 
No
b
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
 
b
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
 
b
Were officers, directors, or trustees, and key employees required to disclose annually interests that could give rise to conflicts? ..........................
12b
 
No
c
Did the organization regularly and consistently monitor and enforce compliance with the policy? If "Yes," describe on Schedule O how this was done...................
12c
 
No
13
Did the organization have a written whistleblower policy? ...............
13
Yes
 
14
Did the organization have a written document retention and destruction policy? .........
14
Yes
 
15
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?
a
The organization’s CEO, Executive Director, or top management official ...........
15a
 
No
b
Other officers or key employees of the organization ................
15b
 
No
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
 
No
b
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
17
List the states with which a copy of this Form 990 is required to be filed
DC
18
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.
19
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.
20
State the name, address, and telephone number of the person who possesses the organization's books and records:
SMITHBUCKLIN CORPORATION2001 K STREET NW 300   WASHINGTON,DC20006 (202) 367-1164
Form 990 (2023)
Form 990 (2023)
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.

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

RoundBullet 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.

RoundBullet 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
Individual Trustee or Director; Institutional Trustee; OfficerInd; Key Employee; Highest compensated employee; FormerOfcrDirectorTrusteeInd;
(1) MATTHEW CALLSTROM PRESIDENT......................................................................
UNTIL FEB. 2023, THEN PAST PRESIDENT
 2.00
.................
  		X   X       0 0 0
(2) MUNEEB AHMED PRESIDENT ELECT......................................................................
UNTIL FEB. 2023, THEN PRESIDENT
 2.00
.................
  		X   X       0 0 0
(3) ALEXIS KELEKIS TREASURER UNTIL......................................................................
FEB. 2023, THEN PRESIDENT ELECT
 2.00
.................
  		X   X       0 0 0
(4) JACK JENNINGS BOARD MEMBER......................................................................
UNTIL FEB. 2023, THEN TREASURER
 2.00
.................
  		X   X       0 0 0
(5) UEI PUA......................................................................
BOARD MEMBER
 1.00
.................
  		X           0 0 0
(6) EDWARD KIM......................................................................
BOARD MEMBER
 1.00
.................
  		X           0 0 0
(7) SARAH WHITE......................................................................
BOARD MEMBER
 1.00
.................
  		X           0 0 0
(8) DAVID BREEN......................................................................
BOARD MEMBER AS OF FEB. 2023
 1.00
.................
  		X           0 0 0
(9) FRANCO ORSI......................................................................
BOARD MEMBER AS OF FEB. 2023
 1.00
.................
  		X           0 0 0
(10) RON ARELLANO......................................................................
BOARD MEMBER AS OF FEB. 2023
 1.00
.................
  		X           0 0 0
(11) COSTI SOFOCLEOUS......................................................................
BOARD MEMBER UNTIL JAN. 2023
 1.00
.................
  		X           0 0 0
(12) JENA EBERLY STACK......................................................................
EXECUTIVE DIRECTOR
 20.00
.................
  		    X       0 0 0










Form 990 (2023)
Form 990 (2023)
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
Individual Trustee or Director; Institutional Trustee; OfficerInd; Key Employee; Highest compensated employee; FormerOfcrDirectorTrusteeInd;


























1b Sub-Total..............
c Total from continuation sheets to Part VII, Section A..
d Total (add lines 1b and 1c)......... 0 0 0
2
Total number of individuals (including but not limited to those listed above) who received more than $100,000 of reportable compensation from the organization 0
Yes
No
3
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 ..............
3
 
No
4
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...........................
4
 
No
5
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 ........
5
 
No
Section B. Independent Contractors
1
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
SMITHBUCKLIN CORPORATION

2001 K STREET NW 300
WASHINGTON,DC20006 		MANAGEMENT (INCL. ED COMP.) 1,291,001
COOMBS CONSULTING LLC

1852 MERCHANT ROAD NORTH
CAPE VINCENT,NY13618 		CLINICAL STUDY RESEARCH MANAGER 147,418
PIXEL

1200 CLINTON STREET SUITE 233
NASHVILLE,TN37203 		A/V SERVICES 136,889
2
Total number of independent contractors (including but not limited to those listed above) who received more than $100,000 of compensation from the organization 3
Form 990 (2023)
Form 990 (2023)
Page 9
Part VIII
Statement of Revenue
Check if Schedule O contains a response or note to any line in this Part VIII.............
(A)
Total revenue 		(B)
Related or
exempt
function
revenue 		(C)
Unrelated
business
revenue 		(D)
Revenue
excluded from
tax under sections
512 - 514
Contributions, Gifts, Grants, and OtherAmt Similar Amounts 1a Federated campaigns..1a  
b Membership dues..1b  
c Fundraising events..1c  
d Related organizations1d  
e Government grants (contributions)1e  
f All other contributions, gifts, grants, and similar amounts not included above1f 1,164,900
g Noncash contributions included in lines 1a - 1f:$ 1g  
h Total. Add lines 1a-1f....... 1,164,900
Program Service RevenueAmt Business Code
2a ANNUAL MEETING 900099 1,377,772 1,377,772    
b MEMBERSHIP DUES 900099 415,234 415,234    
c OTHER MEETINGS 900099 397,171 397,171    
d ONLINE LEARNING 900099 301,650 301,650    
e PUBLICATIONS 900099 1,755 1,755    
f All other program service revenue.        
g Total. Add lines 2a–2f ..... 2,493,582
OtherAmtRevenueAmt 3 Investment income (including dividends, interest, and othersimilar amounts) ...... 109,929     109,929
4 Income from investment of tax-exempt bond proceeds        
5 Royalties........... 14,096     14,096
(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 57,078  
b Less: cost or other basis and sales expenses 7b 99,198  
c Gain or (loss) 7c -42,120  
d Net gain or (loss)......... -42,120     -42,120
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..        
OtherRevenueMiscAmt
Business Code
11a            
b            
c            
d All other revenue ....        
e Total. Add lines 11a–11d ......  
12 Total revenue. See instructions..... 3,740,387 2,493,582 0 81,905
Form 990 (2023)
Form 990 (2023)
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 ....    
2 Grants and other assistance to domestic individuals. See Part IV, line 22 ........... 221,560  
3 Grants and other assistance to foreign organizations, foreign governments, and foreign individuals. See Part IV, lines 15 and 16. .............    
4 Benefits paid to or for members .......    
5 Compensation of current officers, directors, trustees, and key employees ...........        
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........        
8 Pension plan accruals and contributions (include section 401(k) and 403(b) employer contributions) ....        
9 Other employee benefits .......        
10 Payroll taxes ...........        
11 Fees for services (non-employees):        
a Management ...... 1,023,278      
b Legal ......... 36,173      
c Accounting ........... 12,500      
d Lobbying ...........        
e Professional fundraising services. See Part IV, line 17    
f Investment management fees ...... 492      
g Other (If line 11g amount exceeds 10% of line 25, column (A) amount, list line 11g expenses on Schedule O) 467,523      
12 Advertising and promotion .... 2,109      
13 Office expenses ....... 40,330      
14 Information technology ...... 3,354      
15 Royalties ..        
16 Occupancy ...........        
17 Travel ............ 142,714      
18 Payments of travel or entertainment expenses for any federal, state, or local public officials .        
19 Conferences, conventions, and meetings .... 774,737      
20 Interest ...........        
21 Payments to affiliates .......        
22 Depreciation, depletion, and amortization ..        
23 Insurance ... 11,597      
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 RESEARCH 102,467      
b MISCELLANEOUS 31,744      
c LICENSES AND FEES 18,495      
d
e All other expenses        
25 Total functional expenses. Add lines 1 through 24e 2,889,073      
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 (2023)
Form 990 (2023)
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
Assets 1 Cash–non-interest-bearing ........ 1,037,538 1 1,859,929
2 Savings and temporary cash investments ......... 4,824,799 2 2,332,345
3 Pledges and grants receivable, net ...... 1,500,000 3 500,000
4 Accounts receivable, net ............. 92,000 4 72,000
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 ...... 189,964 9 339,193
10a Land, buildings, and equipment: cost or other basis. Complete Part VI of Schedule D 10a  
b Less: accumulated depreciation 10b     10c  
11 Investments—publicly traded securities .   11 4,947,518
12 Investments—other securities. See Part IV, line 11 .....   12  
13 Investments—program-related. See Part IV, line 11 ..   13  
14 Intangible assets ...............   14  
15 Other assets. See Part IV, line 11 ...........   15  
16 Total assets. Add lines 1 through 15 (must equal line 33)... 7,644,301 16 10,050,985
Liabilities 17 Accounts payable and accrued expenses ..... 167,839 17 116,903
18 Grants payable ... 164,900 18 94,900
19 Deferred revenue ......... 773,915 19 2,352,473
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   25  
26 Total liabilities. Add lines 17 through 25.. 1,106,654 26 2,564,276
Net Assets or Fund Balance Organizations that follow FASB ASC 958, check here and complete lines 27, 28, 32, and 33.
27 Net assets without donor restrictions .......... 788,198 27 1,504,466
28 Net assets with donor restrictions ........... 5,749,449 28 5,982,243
Organizations that do not follow FASB ASC 958, check here right arrow 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 ........... 6,537,647 32 7,486,709
33 Total liabilities and net assets/fund balances ........ 7,644,301 33 10,050,985
Form 990 (2023)
Form 990 (2023)
Page 12
Part XI
Reconcilliation of Net Assets
Check if Schedule O contains a response or note to any line in this Part XI..............
1
Total revenue (must equal Part VIII, column (A), line 12) ............
1
3,740,387
2
Total expenses (must equal Part IX, column (A), line 25) ............
2
2,889,073
3
Revenue less expenses. Subtract line 2 from line 1 ..............
3
851,314
4
Net assets or fund balances at beginning of year (must equal Part X, line 32, column (A)) ..
4
6,537,647
5
Net unrealized gains (losses) on investments ...............
5
97,748
6
Donated services and use of facilities .................
6
 
7
Investment expenses .....................
7
 
8
Prior period adjustments .....................
8
 
9
Other changes in net assets or fund balances (explain in Schedule O) ........
9
0
10
Net assets or fund balances at end of year. Combine lines 3 through 9 (must equal Part X, line 32, column (B))
10
7,486,709
Part XII
Financial Statements and Reporting
Check if Schedule O contains a response or note to any line in this Part XII.............
Yes
No
1
Accounting method used to prepare the Form 990:  
If the organization changed its method of accounting from a prior year or checked "Other," explain on
Schedule O.
2a
Were the organization’s financial statements compiled or reviewed by an independent accountant?
2a
 
No
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:
b
Were the organization’s financial statements audited by an independent accountant?
2b
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:
c
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?
2c
Yes
 
If the organization changed either its oversight process or selection process during the tax year, explain in Schedule O.
3a
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?
3a
 
No
b
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.
3b
 
 
Form 990 (2023)
Form 990 (2023)
Additional Data


Software ID:  
Software Version:  
Form 990, Special Condition Description:
Special Condition Description
Schedule B
(Form 990)
Department of the Treasury
Internal Revenue Service
Schedule of Contributors

Arrow Bullet Attach to Form 990, 990-EZ, or 990-PF.
Arrow Bullet Go to www.irs.gov/Form990 for the latest information.
OMB No. 1545-0047
2023
Name of the organization
SOCIETY OF INTERVENTIONAL ONCOLOGY INC
 
Employer identification number

41-2161648
Organization type (check one):
Filers of:
Section:
Form 990 or 990-EZ






Form 990-PF




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
Special Rules
......... Arrow Bullet $  
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) (2023)
Schedule B (Form 990) (2023) Page 2
Name of organization
SOCIETY OF INTERVENTIONAL ONCOLOGY INC
  		Employer identification number
41-2161648
Part I
Contributors
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


(Complete Part II for noncash contributions.)
(a)
No.		 (b)
Name, address, and ZIP + 4		 (c)
Total contributions		 (d)
Type of contribution
 
 
 
 

$  


(Complete Part II for noncash contributions.)
(a)
No.		 (b)
Name, address, and ZIP + 4		 (c)
Total contributions		 (d)
Type of contribution
 
 
 
 

$  


(Complete Part II for noncash contributions.)
(a)
No.		 (b)
Name, address, and ZIP + 4		 (c)
Total contributions		 (d)
Type of contribution
 
 
 
 

$  


(Complete Part II for noncash contributions.)
(a)
No.		 (b)
Name, address, and ZIP + 4		 (c)
Total contributions		 (d)
Type of contribution
 
 
 
 

$  


(Complete Part II for noncash contributions.)
(a)
No.		 (b)
Name, address, and ZIP + 4		 (c)
Total contributions		 (d)
Type of contribution
 
 
 
 

$  


(Complete Part II for noncash contributions.)
Schedule B (Form 990) (2023)
Schedule B (Form 990) (2023)
Page 3
Name of organization
SOCIETY OF INTERVENTIONAL ONCOLOGY INC
  		Employer identification number

41-2161648
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) (2023)
Schedule B (Form 990) (2023)
Page 4
Name of organization
SOCIETY OF INTERVENTIONAL ONCOLOGY INC
  		Employer identification number

41-2161648
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 $1,000 or less for the year. (Enter this information once. See instructions.) Arrow Bullet$  
Use duplicate copies of Part III if additional space is needed.
(a)
No. from Part I		 (b) Purpose of gift (c) Use 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 (c) Use 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 (c) Use 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 (c) Use 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) (2023)
Additional Data


Software ID:  
Software Version:  
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 arrowGo to www.irs.gov/Form990 for instructions and the latest information.
OMB No. 1545-0047
2022
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
SOCIETY OF INTERVENTIONAL ONCOLOGY INC
 
Employer identification number

41-2161648
Part I-A
Complete if the organization is exempt under section 501(c) or is a section 527 organization.

1
Provide a description of the organization’s direct and indirect political campaign activities in Part IV. See instructions for definition of “political campaign activities."

2
Political campaign activity expenditures. See instructions ....................................................................right arrow
$  
3
Volunteer hours for political campaign activities. See instructions ..................................................................
 

Part I-B
Complete if the organization is exempt under section 501(c)(3).
1
Enter the amount of any excise tax incurred by the organization under section 4955 ................................right arrow
$  
2
Enter the amount of any excise tax incurred by organization managers under section 4955 .......................right arrow
$  
3
If the organization incurred a section 4955 tax, did it file Form 4720 for this year? .........................................
4a
Was a correction made? ......................................................................................................................
b
If "Yes," describe in Part IV.
Part I-C
Complete if the organization is exempt under section 501(c), except section 501(c)(3).
1
Enter the amount directly expended by the filing organization for section 527 exempt function activities ..... right arrow
$  
2
Enter the amount of the filing organization's funds contributed to other organizations for section 527 exempt function activities ............................................................................................................................right arrow

$  
3
Total exempt function expenditures. Add lines 1 and 2. Enter here and on Form 1120-POL, line 17b...........right arrow

$  
4
Did the filing organization file Form 1120-POL for this year? ...................................................................
5
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) 2022

Schedule C (Form 990) 2022
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 arrowexpenses, and share of excess lobbying expenditures).
B Check right arrow
Limits on Lobbying Expenditures
(The term "expenditures" means amounts paid or incurred.) 		(a) Filing
organization's
totals 		(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? ...................................................................................................................

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) 2019 (b) 2020 (c) 2021 (d) 2022 (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) 2022


Schedule C (Form 990) 2022
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|No
(b)
Amount
1
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:
a
Volunteers? ...........................................................................................................
 
 
b
Paid staff or management (include compensation in expenses reported on lines 1c through 1i)? ........
 
 
c
Media advertisements? ...................................................................................................
 
 
 
d
Mailings to members, legislators, or the public? .............................................................................
 
 
 
e
Publications, or published or broadcast statements? ...........................................................
 
 
 
f
Grants to other organizations for lobbying purposes? ..........................................................
 
 
 
g
Direct contact with legislators, their staffs, government officials, or a legislative body? .......................
 
 
 
h
Rallies, demonstrations, seminars, conventions, speeches, lectures, or any similar means? ..................
 
 
 
i
Other activities? ...................................................................................................................
 
 
 
j
Total. Add lines 1c through 1i ....................................................................................................
 
2a
Did the activities in line 1 cause the organization to be not described in section 501(c)(3)? .....
 
 
b
If "Yes," enter the amount of any tax incurred under section 4912 ...........................................
 
c
If "Yes," enter the amount of any tax incurred by organization managers under section 4912 ...................
 
d
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
No
1
Were substantially all (90% or more) dues received nondeductible by members? ...............................................
1
 
No
2
Did the organization make only in-house lobbying expenditures of $2,000 or less? ............................................
2
Yes
 
3
Did the organization agree to carry over lobbying and political expenditures from the prior year? .................................
3
 
No
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."
1
Dues, assessments and similar amounts from members ......................................................................
1
 
2
Section 162(e) nondeductible lobbying and political expenditures (do not include amounts of political expenses for which the section 527(f) tax was paid).
a
Current year .............................................................................................................................
2a
 
b
Carryover from last year ............................................................................................................
2b
 
c
Total ...........................................................................................................................................
2c
 
3
Aggregate amount reported in section 6033(e)(1)(A) notices of nondeductible section 162(e) dues .
3
 
4
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? ......................................................................................................................
4
 
5
Taxable amount of lobbying and political expenditures. See Instructions .........................................
5
 
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) 2022


Additional Data


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SCHEDULE D
(Form 990)
Department of the Treasury
Internal Revenue Service
Supplemental Financial Statements
right arrow 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
2022
Open to Public Inspection
Name of the organization
SOCIETY OF INTERVENTIONAL ONCOLOGY INC
 
Employer identification number

41-2161648
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 ........    
5
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? ............
6
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? ...................................
Part II
Conservation Easements.
Complete if the organization answered "Yes" on Form 990, Part IV, line 7.
1
Purpose(s) of conservation easements held by the organization (check all that apply).
2
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.
Held at the End of the 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  
3
Number of conservation easements modified, transferred, released, extinguished, or terminated by the organization during the
tax year right arrow  
4
Number of states where property subject to conservation easement is located right arrow  
5
Does the organization have a written policy regarding the periodic monitoring, inspection, handling of violations, and enforcement of the conservation easements it holds? ............
6
Staff and volunteer hours devoted to monitoring, inspecting, handling of violations, and enforcing conservation easements during the year
right arrow  
7
Amount of expenses incurred in monitoring, inspecting, handling of violations, and enforcing conservation easements during the year
right arrow $  
8
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)? .............................
9
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.
1a
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.
b
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 $  
2
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:
a
Revenue included on Form 990, Part VIII, line 1 ..........................right arrow $  
b
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) 2022

Schedule D (Form 990) 2022
Page 2
Part III
Organizations Maintaining Collections of Art, Historical Treasures, or Other Similar Assets (continued)
3
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):
a
d
b
e
 
c
4
Provide a description of the organization’s collections and explain how they further the organization’s exempt purpose in
Part XIII.
5
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?...
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.
1a
Is the organization an agent, trustee, custodian or other intermediary for contributions or other assets not
included on Form 990, Part X? ....................................
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  
2a
Did the organization include an amount on Form 990, Part X, line 21, for escrow or custodial account liability? ...
b
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 ......          
2
Provide the estimated percentage of the current year end balance (line 1g, column (a)) held as:
a
Board designated or quasi-endowment right arrow  
b
Permanent endowment right arrow  
c
Term endowment right arrow  
The percentages on lines 2a, 2b, and 2c should equal 100%.
3a
Are there endowment funds not in the possession of the organization that are held and administered for the
organization by:

Yes
No
(i) Unrelated organizations .................
3a(i)
 
 
(ii) Related organizations .................
3a(ii)
 
 
b
If "Yes" on 3a(ii), are the related organizations listed as required on Schedule R? .........
3b
 
 
4
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        
d Equipment ....        
e Other .....        
Total. Add lines 1a through 1e. (Column (d) must equal Form 990, Part X, column (B), line 10(c).)..right arrow 0
Schedule D (Form 990) 2022

Schedule D (Form 990) 2022
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)
(B)
(C)
(D)
(E)
(F)
(G)
(H)
Total. (Column (b) must equal Form 990, Part X, col. (B) line 12.)right arrow  
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.)right arrow  
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)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
Total. (Column (b) must equal Form 990, Part X, col.(B) line 15.)...........right arrow  
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  








Total. (Column (b) must equal Form 990, Part X, col.(B) line 25.)right arrow  
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) 2022

Schedule D (Form 990) 2022
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 3,837,643
2 Amounts included on line 1 but not on Form 990, Part VIII, line 12:
a Net unrealized gains (losses) on investments .... 2a 97,748
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 97,748
3 Subtract line 2e from line 1.................. 3 3,739,895
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 492
b Other (Describe in Part XIII.) ........... 4b  
c Add lines 4a and 4b.................... 4c 492
5 Total revenue. Add lines 3 and 4c. (This must equal Form 990, Part I, line 12.) ...... 5 3,740,387
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 2,888,581
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 0
3 Subtract line 2e from line 1................... 3 2,888,581
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 492
b Other (Describe in Part XIII.) ........... 4b  
c Add lines 4a and 4b..................... 4c 492
5 Total expenses. Add lines 3 and 4c. (This must equal Form 990, Part I, line 18.) ...... 5 2,889,073
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
PART X, LINE 2: SIO BELIEVES THAT IT HAS APPROPRIATE SUPPORT FOR ANY TAX POSITIONS TAKEN, AND AS SUCH, DOES NOT HAVE ANY UNCERTAIN TAX POSITIONS THAT ARE MATERIAL TO THE FINANCIAL STATEMENTS OR THAT WOULD HAVE AN EFFECT ON ITS TAX-EXEMPT STATUS. THERE ARE NO UNRECOGNIZED TAX BENEFITS OR LIABILITIES THAT NEED TO BE RECORDED.
Schedule D (Form 990) 2022


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Schedule I
(Form 990)
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 the latest information.
OMB No. 1545-0047
2023
Open to Public
Inspection
Name of the organization
SOCIETY OF INTERVENTIONAL ONCOLOGY INC
 
Employer identification number
41-2161648
Part I
General Information on Grants and Assistance
1
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? ........................
2
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)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
2
Enter total number of section 501(c)(3) and government organizations listed in the line 1 table ................. Bullet Image
 
3
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) 2023

Schedule I (Form 990) 2023
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) TRAVEL STIPEND 89 221,560      
(1)
(2)
(3)
(4)
(5)
(6)
(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: ASSISTANCE IS IN THE FORM OF TRAVEL STIPENDS AND FREE REGISTRATION TO THE SIO ANNUAL SCIENTIFIC MEETING, PLUS FUNDING TO SUPPORT THE START OF A RESEARCH PROJECT UNDER THE GUIDANCE OF A MENTOR. MINIMAL MONITORING IS REQUIRED.
Schedule I (Form 990) 2023



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SCHEDULE O
(Form 990)

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 the latest information.
OMB No. 1545-0047
2023
Open to Public
Inspection
Name of the organization
SOCIETY OF INTERVENTIONAL ONCOLOGY INC
 
Employer identification number

41-2161648
Return Reference Explanation
FORM 990, PART VI, SECTION A, LINE 3 THE ORGANIZATION HAS ENTERED INTO A MANAGEMENT CONTRACT WITH SMITHBUCKLIN CORPORATION. UNDER THE TERMS OF THIS CONTRACT, SIO MAKES PAYMENTS TO SMITHBUCKLIN WHICH COVER STAFF SALARIES AND OTHER OVERHEAD EXPENSES. THE FEES INCURRED BY SIO DURING THE YEAR ENDED DECEMBER 31, 2023 WERE $1,023,278 FOR THE FOLLOWING: EXECUTIVE MANAGEMENT OF $225,000, MEMBERSHIP AND OPERATIONS SERVICES, EVENT SERVICES, REGISTRATION SERVICES, TRADESHOW SERVICES, MARKETING AND COMMUNICATIONS SERVICES, CREATIVE AND DESIGN SERVICES, FINANCIAL MANAGEMENT AND ACCOUNTING SERVICES, INFORMATION TECHNOLOGY SERVICES, FULLFILMENT SERVICES, SITE SELECTION AND CONTRACTING, CONTENT SERVICES, AMS PLATFORM AND SUPPORT, AND PROMOTIONAL PRODUCTS AND SUPPORT. SMITHBUCKLIN'S PERFORMANCE UNDER THIS AGREEMENT IS MONITORED BY THE BOARD OF SIO.
FORM 990, PART VI, SECTION A, LINE 6 THE MEMBERSHIP OF THE SOCIETY SHALL CONSIST OF: ACTIVE - DUES PAYING INDIVIDUALS WHO ARE PHYSICIANS WHO PRACTICE INTERVENTIONAL ONCOLOGY OR A RELATED FIELD AND PHD LEVEL SCIENTISTS. ACTIVE MEMBERS ARE VOTING MEMBERS WHO CAN HOLD OFFICE OR SERVE AS COMMITTEE CHAIRS. AFFILIATE - DUES PAYING INDIVIDUALS WHO ARE NOT PHYSICIANS, BUT ARE RELATED MEDICAL PROFESSIONALS, RESEARCH ASSISTANTS, OR HEALTH SPECIALISTS WHO SUPPORT ACTIVITIES RELATED TO INTERVENTIONAL ONCOLOGY. AFFILIATE MEMBERS CANNOT VOTE OR HOLD OFFICE, BUT CAN SERVE ON A COMMITTEE. RESIDENT/FELLOW - DUES PAYING INDIVIDUALS IN THEIR RESIDENCY OR FELLOWSHIP. RESIDENTS AND FELLOWS CANNOT VOTE, SERVE ON A COMMITTEE, OR HOLD OFFICE. STUDENT - DUES PAYING INDIVIDUALS WHO ARE STUDENTS OF INTERVENTIONAL ONCOLOGY OR RELATED FIELD. STUDENTS CANNOT VOTE, SERVE ON A COMMITTEE, OR HOLD OFFICE.
FORM 990, PART VI, SECTION A, LINE 7A THE ORGANIZATION'S MEMBERS ELECT THE MEMBERS OF THE BOARD OF DIRECTORS.
FORM 990, PART VI, SECTION B, LINE 11B THE FORM 990 IS REVIEWED BY THE STAFF OF THE MANAGEMENT COMPANY, INCLUDING THE EXECUTIVE DIRECTOR, AND A COPY IS PROVIDED TO THE ENTIRE BOARD PRIOR TO FILING.
FORM 990, PART VI, SECTION C, LINE 19 THE ORGANIZATION MAKES ITS GOVERNING DOCUMENTS AND FINANCIAL STATEMENTS AVAILABLE TO THE PUBLIC UPON REQUEST.
FORM 990, PART IX, LINE 11G SPEAKER FEE 87,730. OTHER PROFESSIONAL FEES 379,793.
FORM 990, PART XII, LINE 2C: THE ORGANIZATION HAS NOT CHANGED ITS OVERSIGHT PROCESS OR SELECTION PROCESS OF AN INDEPENDENT ACCOUNTANT DURING THE TAX YEAR.
For Paperwork Reduction Act Notice, see the Instructions for Form 990 or 990-EZ.
Cat. No. 51056K
Schedule O (Form 990) 2023


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