TY 2010 Form 990

- TIN:

Form990

Department of the Treasury
Internal Revenue Service

Return of Organization Exempt From Income Tax

Under section 501(c), 527, or 4947(a)(1) of the Internal Revenue Code (except black lung benefit trust or private foundation)

The organization may have to use a copy of this return to satisfy state reporting requirements.

OMB No. 1545-0047

2010

Open to Public Inspection

A For the calendar year, or tax year beginning 01-01-2010 and ending 12-31-2010

BCheck if applicable: Address change Name change Initial return Terminated Amended return Application pending

CName of organization
AMERICAN SOCIETY FOR RADIATION ONCOLOGY

Doing Business As

Number and street (or P.O. box if mail is not delivered to street address)
8280 WILLOW OAKS CORPORATE DRIVE NO
500

Room/suite

City or town, state or country, and ZIP + 4
FAIRFAX, VA22031

D Employer identification number

42-0943164

E Telephone number

G Gross receipts $ 16,867,207

F Name and address of principal officer:
LAURA I THEVENOT
8280 WILLOW OAKS CORPORATE DRIVE NO
500
FAIRFAX,VA22031

Tax-exempt status: 501(c)(3) 501(c) ( 6 ) LeftBullet

(insert no.) 4947(a)(1) or 527

Website:

WWW.ASTRO.ORG

H(a)

Is this a group return for
affiliates? Yes No

H(b)

Are all affiliates included?

Yes No

If "No," attach a list. (see instructions)

H(c)

Group exemption number MediumBullet

K Form of organization: Corporation Trust Association Other MediumBullet

L Year of formation: 1958

M State of legal domicile: VA

Part I

Summary

1	Briefly describe the organization’s mission or most significant activities: ASTRO IS DEDICATED TO IMPROVING PATIENT CARE THROUGH EDUCATION, CLINICAL PRACTICE, ADVANCEMENTS OF SCIENCE, AND ADVOCACY.
2	Check this box
3	Number of voting members of the governing body (Part VI, line 1a) ....	3	20
4	Number of independent voting members of the governing body (Part VI, line 1b) ....	4	20
5	Total number of individuals employed in calendar year 2010 (Part V, line 2a) ...	5	73
6	Total number of volunteers (estimate if necessary) ....	6	870
7a	Total unrelated business revenue from Part VIII, column (C), line 12 ..	7a	177,337
b	Net unrelated business taxable income from Form 990-T, line 34 ..	7b	0

		Prior Year	Current Year
8	Contributions and grants (Part VIII, line 1h) .........	0	0
9	Program service revenue (Part VIII, line 2g) .........	11,177,755	14,045,309
10	Investment income (Part VIII, column (A), lines 3, 4, and 7d ) ....	626,797	577,536
11	Other revenue (Part VIII, column (A), lines 5, 6d, 8c, 9c, 10c, and 11e)	2,586,810	2,244,362
12	Total revenue—add lines 8 through 11 (must equal Part VIII, column (A), line 12)...................	14,391,362	16,867,207
13	Grants and similar amounts paid (Part IX, column (A), lines 1–3 )...	22,500	0
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)	4,678,477	5,027,656
16a	Professional fundraising fees (Part IX, column (A), line 11e)....	334,200	0
b	Total fundraising expenses (Part IX, column (D), line 25) 0
17	Other expenses (Part IX, column (A), lines 11a–11d, 11f–24f)....	10,024,419	10,105,468
18	Total expenses. Add lines 13–17 (must equal Part IX, column (A), line 25)	15,059,596	15,133,124
19	Revenue less expenses. Subtract line 18 from line 12......	-668,234	1,734,083
		Beginning of Current Year	End of Year
20	Total assets (Part X, line 16)............	28,456,982	31,990,285
21	Total liabilities (Part X, line 26)............	4,707,483	4,218,451
22	Net assets or fund balances. Subtract line 21 from line 20 .....	23,749,499	27,771,834

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's Use Only	Preparer's signature	Date	Check if self- employed	Preparer’s taxpayer identification number (see instructions)
	Firm’s name (or yours if self-employed), address, and ZIP + 4			EIN
				Phone no.

May the IRS discuss this return with the preparer shown above? (see instructions) ......... Yes No

For Privacy Act and Paperwork Reduction Act Notice, see the separate instructions.

Cat. No. 11282Y

Form 990 (2010)

Page 2

Part III

Statement of Program Service Accomplishments

Check if Schedule O contains a response to any question in this Part III . . . . . . . . . .

Briefly describe the organization’s mission: TO ADVANCE THE PRACTICE OF RADIATION ONCOLOGY BY PROMOTING EXCELLENCE IN PATIENT CARE, PROVIDING OPPORTUNITIES FOR EDUCATIONAL AND PROFESSIONAL DEVELOPMENT, PROMOTING RESEARCH AND DISSEMINATING RESEARCH RESULTS AND REPRESENTING RADIATION ONCOLOGY IN A RAPIDLY EVOLVING HEALTHCARE ENVIRONMENT.

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 exempt purpose achievements for each of the organization’s three largest program services by expenses.
Section 501(c)(3) and 501(c)(4) organizations and section 4947(a)(1) trusts 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 SCIENTIFIC MEETING, SPRING REFRESHER, MULTI DISCIPLINARY HEAD & NECK SYMPOSIUMS, AND THORACIC SYMPOSIUMS.

4b	(Code: ) (Expenses $ including grants of $ ) (Revenue $ )
	MEMBER NEWSLETTER INFORMS MEMBERS OF CURRENT ISSUES RELATING TO THE FIELD OF RADIATION ONCOLOGY. THE NEWSLETTER IS USED TO DISSEMINATE INFORMATION THAT IS IMPORTANT TO THE SOCIETY'S PURPOSE.

4c	(Code: ) (Expenses $ including grants of $ ) (Revenue $ )
	SCIENTIFIC JOURNAL IS EDUCATIONAL IN NATURE AND SERVES TO PROMOTE THE SOCIETY'S EXEMPT FUNCTION.

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

Form 990 (2010)

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? ........

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

..........

Section 501(c)(3) organizations. Did the organization engage in lobbying activities? 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 Revenue Procedure 98-19? If “Yes,” complete Schedule C, Part III Click to see attachment

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

Yes

Did the organization maintain any donor advised funds or any similar funds or accounts where 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

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

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

...

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

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

Did the organization report an amount in Part X, line 21; 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

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

Did the organization, directly or through a related organization, hold assets in term, permanent,or quasi-endowments? If “Yes,” complete Schedule D, Part V Click to see attachment

Yes

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, line10? If “Yes,” complete Schedule D, Part VI. Click to see attachment

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

11b

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

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

11d

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

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

11f

12a

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

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, XII, and XIII is optional Click to see attachment

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, and program service activities outside the United States? If “Yes,” complete Schedule F, Part I......... Click to see attachment

14b

Yes

Did the organization report on Part IX, column (A), line 3, more than $5,000 of grants or assistance to any organization or entity located outside the U.S.? If “Yes,” complete Schedule F, Part II.. Click to see attachment

Did the organization report on Part IX, column (A), line 3, more than $5,000 of aggregate grants or assistance to individuals located outside the U.S.? If “Yes,” complete Schedule F, Part III.. Click to see attachment

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

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

Form 990 (2010)

Page 4

Part IV

Checklist of Required Schedules (continued)

20a

Did the organization operate one or more hospitals? If “Yes,” complete Schedule H.....

20a

Did the organization attach its audited financial statement to this return? Note: All Form 990 filers that operate one or more hospitals must attach audited financial statements. .....

20b

Did the organization report more than $5,000 of grants and other assistance to governments and organizations in the United States on Part IX, column (A), line 1? If “Yes,” complete Schedule I, Parts I and II..

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

Did the organization answer “Yes” to Part VII, Section A, questions 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

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 questions 24b–24d and complete Schedule K. If “No,” go to line 25................

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) and 501(c)(4) 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

Was a loan to or by a current or former officer, director, trustee, key employee, highly compensated employee, or disqualified person outstanding as of the end of the organization’s tax year? If “Yes,” complete Schedule L,
Part II...........................

Did the organization provide a grant or other assistance to an officer, director, trustee, key employee, substantial contributor, or a grant selection committee member, or to a person related to such an individual? If “Yes,” complete Schedule L, Part III...............

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

A current or former officer, director, trustee, or key employee? If “Yes,” complete Schedule L, Part IV .........................

28a

A family member of a current or former officer, director, trustee, or key employee? If “Yes,”
complete Schedule L, Part IV...................

28b

An entity of which a current or former officer, director, trustee, or key employee (or a family member thereof) was an officer, director, trustee, or owner? 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

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

Yes

Is any related organization a controlled entity within the meaning of section 512(b)(13)? .....

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

YesNo

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

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

Yes

Form 990 (2010)

Page 5

Part V

Statements Regarding Other IRS Filings and Tax Compliance

Check if Schedule O contains a response to any question in this Part V . . . . . . . . . .

Yes

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

185

Enter the number of Forms W-2G included in 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

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

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

Note. If the sum of lines 1a and 2a is greater than 250, you may be required to e-file. (see instructions)

Yes

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,” 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 or securities account)?.......................

Yes

If "Yes," enter the name of the foreign country: MediumBullet

CJ
See instructions for filing requirements for Form TD F 90-22.1, Report of Foreign Bank and Financial Accounts.

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?..........

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 and section 509(a)(3) supporting organizations. Did the supporting organization, or a donor advised fund maintained by a sponsoring organization, have excess business holdings at any time during the year?................

Sponsoring organizations maintaining donor advised funds.

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

Did the 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. All 501(c)(29) organizations must list in Schedule O each state in which they are licensed to issue qualified health plans, the amount of reserves required by each state, and the amount of reserves the organization allocated to each state.

13a

Enter the aggregate 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 aggregate 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

Form 990 (2010)

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 to any question 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 ..............

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? .

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

Yes

Does the organization have members, stockholders, or other persons who may elect one or more members of the governing body? .........................

Yes

Are any decisions of the governing body subject to approval by members, stockholders, or other persons? ..

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

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

10a

If “Yes,” does the organization have written policies and procedures governing the activities of such chapters, affiliates, and branches to ensure their operations are consistent with those of the organization? ....

10b

11a

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

11a

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

12a

Does the organization have a written conflict of interest policy? If “No,” go to line 13.......

12a

Yes

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

12b

Yes

Does the organization regularly and consistently monitor and enforce compliance with the policy? If “Yes,” describe in Schedule O how this is done ....................

12c

Yes

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

Yes

Does 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

Yes

If "Yes" to line a or b, describe the process in 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,” has the organization adopted a written policy or procedure requiring the organization to evaluate its participation in joint venture arrangements under applicable federal tax law, and taken 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 MediumBullet

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

Own website Another's website Upon request

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

State the name, physical address, and telephone number of the person who possesses the books and records of the organization: MediumBullet

THE SOCIETY
8280 WILLOW OAKS CORPORATE DRIVE NO
FAIRFAX,VA22031
(703) 502-1550

Form 990 (2010)

Page 7

Part VII

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

Check if Schedule O contains a response to any question 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, and current key employees. 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 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 and/or Box 7 of Form 1099-MISC) 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.

List persons in the following order: individual trustees or directors; institutional trustees; officers; key employees; highest
compensated employees; and former such persons.

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

(A) Name and Title	(B) Average hours per week (describe hours for related organizations in Schedule O)	(C) Position (check all that apply)		(D) Reportable compensation from the organization (W- 2/1099-MISC)	(E) Reportable compensation from related organizations (W- 2/1099-MISC)	(F) Estimated amount of other compensation from the organization and related organizations
(A) Name and Title
(1) TIMOTHY R WILLIAMS IMMEDIATE PAST CHAIR	2.00	X		0	0	0
(2) ANTHONY L ZIETMAN CHAIR	2.00	X	X	0	0	0
(3) LEONARD L GUNDERSON PRESIDENT	2.00	X	X	0	0	0
(4) LAURIE E GASPAR SECRETARY/TREASURER	2.00	X	X	0	0	0
(5) MICHAEL L STEINBERG PRESIDENT-ELECT	2.00	X		0	0	0
(6) PHILLIP M DEVLIN SECRETARY/TREASURER-ELECT	2.00	X		0	0	0
(7) DAVID C BEYER HEALTHY POLICY CHAIR	2.00	X		0	0	0
(8) JATINDER R PALTA RESEARCH CHAIR	2.00	X		0	0	0
(9) BRUCE G HAFFTY EDUCATION CHAIR	2.00	X		0	0	0
(10) LAURA A DAWSON EDUCATION VICE-CHAIR	2.00	X		0	0	0
(11) C LELAND ROGERS GOV'T RELATIONS CHAIR	2.00	X		0	0	0
(12) BHARAT B MITTAL GOV'T RELATIONS VICE-CHAIR	2.00	X		0	0	0
(13) NAJEEB MOHIDEEN HEALTH POLICY VICE-CHAIR	2.00	X		0	0	0
(14) JACQUELINE WILLIAMS RESEARCH VICE-CHAIR	2.00	X		0	0	0
(15) PATRICIA J EIFEL BOARD MEMBER	2.00	X		0	0	0
(16) LOUIS B HARRISON BOARD MEMBER	2.00	X		0	0	0
(17) RICHARD P HILL BOARD MEMBER	2.00	X		0	0	0

Form 990 (2010)

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 (describe hours for related organizations in Schedule O)	(C) Position (check all that apply)			(D) Reportable compensation from the organization (W- 2/1099-MISC)	(E) Reportable compensation from related organizations (W- 2/1099-MISC)	(F) Estimated amount of other compensation from the organization and related organizations
(A) Name and Title
(18) MARIA D KELLY BOARD MEMBER	2.00	X			0	0	0
(19) MINESH P MEHTA BOARD MEMBER	2.00	X			0	0	0
(20) LOUIS POTTERS BOARD MEMBER	2.00	X			0	0	0
(21) LAURA I THEVENOT CEO	40.00		X		437,141	0	41,000
(22) TERRY KARRAS CFO	40.00		X		122,854	0	12,630
(23) EMILY WILSON EMPLOYEE	40.00			X	128,594	0	13,436
(24) KATHERINE THOMAS EMPLOYEE	40.00			X	114,167	0	6,858
(25) LYNN M PAGETT-BROWN EMPLOYEE	40.00			X	108,810	0	4,362
(26) MARSHA KAUFMAN EMPLOYEE	40.00			X	102,183	0	10,760
(27) ANNA ARNONE EMPLOYEE	40.00			X	101,039	0	4,334

1b	Sub-Total................
c	Total from continuation sheets to Part VII, Section A....
d	Total (add lines 1b and 1c)............	1,114,788	0	93,380

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

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.

(A) Name and business address	(B) Description of services	(C) Compensation
KBSII WILLOW OAKS LLC PO BOX 645018 CINCINNATI,OH452645018	RENT	573,725
THE EXPO GROUP LP 5931 CAMPUS CIRCLE DRIVE IRVING,TX75063	EXHIBIT MANAGEMENT	412,550
CHERYL REINHARDT 313 EATONS LANDING ANNAPOLIS,MD21401	DEVELOPMENT COUNSEL	370,154
METROPOLITAN PIER EXPO AUTHORITY 301 E CERMAK ROAD CHICAGO,IL60616	CONFERENCE HOSTING	170,936
FAIRMONT HOTEL DALLAS 1717 NORTH AKARD STREET DALLAS,TX75201	CONFERENCE HOSTING	143,643
2 Total number of independent contractors (including but not limited to those listed above) who received more than $100,000 in compensation from the organization 6

Form 990 (2010)

Page 9

Part VIII

Statement of Revenue

				(A) Total revenue	(B) Related or exempt function revenue	(C) Unrelated business revenue	(D) Revenue excluded from tax under sections 512, 513, or 514
1a	Federated campaigns..1a
b	Membership dues....1b
c	Fundraising events....1c
d	Related organizations...1d
e	Government grants (contributions)1e

f	All other contributions, gifts, grants, and similar amounts not included above1f
g	Noncash contributions included in lines 1a-1f:$
h	Total. Add lines 1a-1f.......
			Business Code
2a	ANNUAL MEETING		541,900	7,797,083	7,797,083
b	OTHER EDUCATIONAL MEET		541,900	3,277,428	3,277,428
c	MEMBERSHIP DUES		541,900	2,855,413	2,855,413
d	PUBLICATIONS		511,120	115,385	115,385
e
f	All other program service revenue .
g	Total. Add lines 2a–2f........			14,045,309
3	Investment income (including dividends, interest
	and other similar amounts).....			577,536			577,536
4	Income from investment of tax-exempt bond proceeds..
5	Royalties............			1,515,000			1,515,000
		(i) Real	(ii) Personal
6a	Gross Rents
b	Less: rental expenses
c	Rental income or (loss)
d	Net rental income or (loss).......
		(i) Securities	(ii) Other
7a	Gross amount from sales of assets other than inventory
b	Less: cost or other basis and sales expenses
c	Gain or (loss)
d	Net gain or (loss)..........
8a	Gross income from fundraising events (not including $ of contributions reported on line 1c). See Part IV, line 18 ...
	a
b	Less: direct expenses ...b
c	Net income or (loss) from fundraising events..
9a	Gross income from gaming activities. See Part IV, line 19 ...
	a
b	Less: direct expenses ...b
c	Net income or (loss) from gaming activities...
10a	Gross sales of inventory, less returns and allowances .
	a
b	Less: cost of goods sold ..b
c	Net income or (loss) from sales of inventory..
Miscellaneous Revenue			Business Code
11a	USER GUIDE SALES		900,099	235,710			235,710
b	NEWS MAGAZINE ADVERT		541,800	177,337		177,337
c	JPC POSTING SALES		900,099	124,439	124,439
d	All other revenue ....			191,876	121,390		70,486
e	Total. Add lines 11a–11d ......			729,362
12	Total revenue. See Instructions....			16,867,207	14,291,138	177,337	2,398,732

Form 990 (2010)

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) but are not required to complete columns (B), (C), and (D).

Do not include amounts reported on lines 6b, 7b, 8b, 9b, and 10b of Part VIII.		(A) Total expenses
1	Grants and other assistance to governments and organizations in the U.S. See Part IV, line 21
2	Grants and other assistance to individuals in the U.S. See Part IV, line 22
3	Grants and other assistance to governments, organizations, and individuals outside the U.S. See Part IV, lines 15 and 16
4	Benefits paid to or for members
5	Compensation of current officers, directors, trustees, and key employees ....	1,114,788
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	3,284,181
8	Pension plan contributions (include section 401(k) and section 403(b) employer contributions) ....
9	Other employee benefits .......	333,588
10	Payroll taxes ...........	295,099
11	Fees for services (non-employees):
a	Management ......
b	Legal .........	87,736
c	Accounting ...........	37,315
d	Lobbying ...........
e	Professional fundraising. See Part IV, line 17..
f	Investment management fees ......
g	Other ..........	1,606,596
12	Advertising and promotion ....
13	Office expenses .......	30,386
14	Information technology ......
15	Royalties ..
16	Occupancy ...........	591,787
17	Travel ............	743,448
18	Payments of travel or entertainment expenses for any federal, state, or local public officials ......
19	Conferences, conventions, and meetings ....	1,416,954
20	Interest ...........
21	Payments to affiliates .......
22	Depreciation, depletion, and amortization .....	146,724
23	Insurance ..............	560,331
24	Other expenses. Itemize expenses not covered above. (Expenses grouped together and labeled miscellaneous may not exceed 5% of total expenses shown on line 25 below.)
a	CONTRIBUTIONS	1,103,049
b	AUDIO VISUAL SERVICES	665,624
c	SUBSCRIPTIONS	446,131
d	CREDIT CARD FEES	383,584
e	OTHER EXPENSES	354,843
f	All other expenses	1,930,960
25	Total functional expenses. Add lines 1 through 24f	15,133,124
26	Joint costs. Check here if following SOP 98-2 (ASC 958-720). Complete this line only if the organization reported in column (B) joint costs from a combined educational campaign and fundraising solicitation

Form 990 (2010)

Page 11


				(A) Beginning of year		(B) End of year
1	Cashnon-interest-bearing ..........				1
2	Savings and temporary cash investments .......			5,469,470	2	6,046,691
3	Pledges and grants receivable, net .........				3
4	Accounts receivable, net .........			927,989	4	857,450
5	Receivables from current and former officers, directors, trustees, key employees, and highest compensated employees. Complete Part II of
	Schedule L ..........				5
6	Receivables from other disqualified persons (as defined under section 4958(f)(1)) and persons described in section 4958(c)(3)(B). Complete Part II of
	Schedule L ..........				6
7	Notes and loans receivable, net .............				7
8	Inventories for sale or use ..............				8
9	Prepaid expenses and deferred charges ............			953,525	9	1,498,211
10a	Land, buildings, and equipment: cost or other basis. Complete Part VI of Schedule D	10a	1,094,287
b	Less: accumulated depreciation. .....	10b	820,576	388,444	10c	273,711
11	Investments—publicly traded securities ..........			20,642,976	11	23,270,971
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 ...........			74,578	15	43,251
16	Total assets. Add lines 1 through 15 (must equal line 34)...			28,456,982	16	31,990,285
17	Accounts payable and accrued expenses .			1,606,053	17	2,656,123
18	Grants payable ..........				18
19	Deferred revenue ..........			995,123	19	689,446
20	Tax-exempt bond liabilities ..........				20
21	Escrow or custodial account liability. Complete Part IV of Schedule D..				21
22	Payables to current and former officers, directors, trustees, key employees, highest compensated employees, and disqualified
	persons. Complete Part II of Schedule L..........				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. Complete Part X of Schedule D.....			2,106,307	25	872,882
26	Total liabilities. Add lines 17 through 25.....			4,707,483	26	4,218,451
	Organizations that follow SFAS 117, check here and complete lines 27 through 29, and lines 33 and 34.
27	Unrestricted net assets .....			23,749,499	27	27,771,834
28	Temporarily restricted net assets .....				28
29	Permanently restricted net assets .....				29
	Organizations that do not follow SFAS 117, check here and complete lines 30 through 34.
30	Capital stock or trust principal, or current funds .....				30
31	Paid-in or capital surplus, or land, building or equipment fund .....				31
32	Retained earnings, endowment, accumulated income, or other funds				32
33	Total net assets or fund balances .....			23,749,499	33	27,771,834
34	Total liabilities and net assets/fund balances .....			28,456,982	34	31,990,285

Form 990 (2010)

Page 12

Part XI

Reconcilliation of Net Assets

Check if Schedule O contains a response to any question in this Part XI . . . . . . . . . .

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

16,867,207

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

15,133,124

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

1,734,083

Net assets or fund balances at beginning of year (must equal Part X, line 33, column (A)) . .

23,749,499

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

2,288,252

Net assets or fund balances at end of year. Combine lines 3, 4, and 5 (must equal Part X, line 33, column (B)) . . . . . .

27,771,834

Part XII

Financial Statements and Reporting

Check if Schedule O contains a response to any question 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 in
Schedule O.

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

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

Yes

If “Yes,” to 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?
If the organization changed either its oversight process or selection process during the tax year, explain in Schedule O............................

Yes

If “Yes” to line 2a or 2b, check a box below to indicate whether the financial statements for the year were issued on a separate basis, consolidated basis, or both:

Separate basis Consolidated basis Both consolidated and separated basis

As a result of a federal award, was the organization required to undergo an audit or audits as set forth in the Single Audit Act and OMB Circular A-133? ................

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. ..

Form 990 (2010)

Additional Data

Software ID:
Software Version:

Form 990, Special Condition Description:

Special Condition Description

- TIN:

SCHEDULE C
(Form 990 or 990-EZ)

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
SchCMd Bullet

Complete if the organization is described below.
SchCMd Bullet

Attach to Form 990 or Form 990-EZ. SchCMd Bullet

See separate instructions.

OMB No. 1545-0047

2010

Open to Public
Inspection

If the organization answered “Yes,” to 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,” to 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,” to Form 990, Part IV, Line 5 (Proxy Tax) or Form 990-EZ, Part V, line 35a (Proxy Tax), then
Round Bullet

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

Name of the organization

AMERICAN SOCIETY FOR RADIATION ONCOLOGY

Employer identification number

42-0943164

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 on behalf of or in opposition to candidates for public office in Part IV.

Political expenditures .................................... SchCMd Bullet

Volunteer hours ........................................

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 ......... SchCMd Bullet

Enter the amount of any excise tax incurred by organization managers under section 4955 ...... SchCMd Bullet

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 SchCMd Bullet

Enter the amount of the filing organization's funds contributed to other organizations for section 527 exempt funtion activities .................................... SchCMd Bullet

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

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-.

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

Cat. No. 50084S

Schedule C (Form 990 or 990-EZ) 2010

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 if the filing organization belongs to an affiliated group.
B Check 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 instructions for lines 2a through 2f on page 4.)
Lobbying Expenditures During 4-Year Averaging Period
	Calendar year (or fiscal year beginning in)	(a) 2007	(b) 2008	(c) 2009	(d) 2010	(e) Total

2a	Lobbying non-taxable amount

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

c	Total lobbying expenditures

d	Grassroots non-taxable amount

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

f	Grassroots lobbying expenditures

Schedule C (Form 990 or 990-EZ) 2010

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)).

(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? If "Yes," describe in Part IV ..........................

Total. 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 carryover 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) if BOTH Part III-A, lines 1 and 2 are answered “No” OR if Part III-A, line 3 is answered “Yes”.

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

2,251,653

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

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

645,629

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

65,137

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

710,766

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

723,586

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) ..............

-12,820

Part IV

Supplemental Information

Complete this part to provide the descriptions required for Part l-A, line 1; Part l-B, line 4; Part l-C, line 5; and Part ll-B, line 1i.
Also, complete this part for any additional information.

Identifier	Return Reference	Explanation

Schedule C (Form 990 or 990EZ) 2010

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," to Form 990,
Part IV, line 6, 7, 8, 9, 10, 11, or 12.
SchDMd Bullet

Attach to Form 990. SchDMd Bullet

See separate instructions.

OMB No. 1545-0047

2010

Open to Public Inspection

Name of the organization

AMERICAN SOCIETY FOR RADIATION ONCOLOGY

Employer identification number

42-0943164

Part I

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

		(a) Donor advised funds	(b) Funds and other accounts
1	Total number at end of year .......
2	Aggregate contributions to (during year) ...
3	Aggregate 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 may 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" to 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 pleasure) Preservation of an historically importantly land area

Protection of natural habitat Preservation of a certified historic structure

Preservation of open space

Complete lines 2a–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 8/17/06 ........	2d

Number of conservation easements modified, transferred, released, extinguished, or terminated by the organization during
the taxable year SchDMd Bullet

Number of states where property subject to conservation easement is located SchDMd Bullet

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 and enforcing conservation easements during the year SchDMd Bullet

Amount of expenses incurred in monitoring, inspecting, and enforcing conservation easements during the year SchDMd Bullet

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

Yes No

In Part XIV, 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" to Form 990, Part IV, line 8.

If the organization elected, as permitted under SFAS 116, 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 XIV, the text of the footnote to its financial statements that describes these items.

If the organization elected, as permitted under SFAS 116, 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)

Revenues included in Form 990, Part VIII, line 1 ........................ SchDMd Bullet

(ii)

Assets included in Form 990, Part X .............................. SchDMd Bullet

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 SFAS 116 relating to these items:

Revenues included in Form 990, Part VIII, line 1 .......................... SchDMd Bullet

Assets included in Form 990, Part X ............................... SchDMd Bullet

For Privacy Act and Paperwork Reduction Act Notice, see the Intructions for Form 990

Cat. No. 52283D

Schedule D (Form 990) 2010

Page 2

Part III

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

Using the organization’s 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 XIV.

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" to 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

If "Yes," explain the arrangement in Part XIV and complete the following table:


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? .....................

Yes No

If “Yes,” explain the arrangement in Part XIV.

Part V

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

		(a)Current Year	(b)Prior Year	(c)Two Years Back
1a	Beginning of year balance ....	9,791,767	12,002,461
b	Contributions ........			12,002,461
c	Investment earnings or losses ...
d	Grants or scholarships .....
e	Other expenditures for facilities and programs ........	944,687	2,210,694
f	Administrative expenses ....
g	End of year balance ......	8,847,080	9,791,767	12,002,461

Provide the estimated percentage of the year end balance held as:

Board designated or quasi-endowment: SchDMd Bullet

100.000 %

Permanent endowment: SchDMd Bullet

Term endowment: SchDMd Bullet

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

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

Part VI

InvestmentsLand, Buildings, and Equipment. See Form 990, Part X, line 10.

Description of investment		(b)Cost or other basis (other)	(c) Accumulated depreciation	(d) Book value
1a	Land .................
b	Buildings ................
c	Leasehold improvements ............	32,952	13,322	19,630
d	Equipment ................	664,093	573,215	90,878
e	Other .................	397,242	234,039	163,203
Total. Add lines 1a-1e. (Column (d) should equal Form 990, Part X, column (B), line 10(c).)........				273,711

Schedule D (Form 990) 2010

Page 3

Part VII

InvestmentsOther Securities. 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
Other








Total. (Column (b) should equal Form 990, Part X, col.(B) line 12.)

Part VIII

InvestmentsProgram Related. See Form 990, Part X, line 13.

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









Total. (Column (b) should equal Form 990, Part X, col.(B) line 13.)

Part IX

Other Assets. See Form 990, Part X, line 15.

(a) Description				(b) Book value









Total. (Column (b) should equal Form 990, Part X, col.(B) line 15.)...........

Part X

Other Liabilities. See Form 990, Part X, line 25.

1.(a) Description of Liability		(b) Amount
Federal Income Taxes
DEFERRED RENT		339,288
DUE TO ROI		533,344
DUE TO ASTRO PAC		250






Total. (Column (b) should equal Form 990, Part X, col.(B) line 25.)		872,882
2. Fin 48 (ASC 740) Footnote. In Part XIV, 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 (ASC740).

Schedule D (Form 990) 2010

Page 4

Part XI Reconciliation of Change in Net Assets from Form 990 to Financial Statements
1	Total revenue (Form 990, Part VIII, column (A), line 12) ....................	1	16,867,207
2	Total expenses (Form 990, Part IX, column (A), line 25) .....................	2	15,133,124
3	Excess or (deficit) for the year. Subtract line 2 from line 1 .............	3	1,734,083
4	Net unrealized gains (losses) on investments ..........................	4	2,288,252
5	Donated services and use of facilities .............................	5
6	Investment expenses ...................................	6
7	Prior period adjustments ..................................	7
8	Other (Describe in Part XIV) .................................	8
9	Total adjustments (net). Add lines 4 - 8 .............................	9	2,288,252
10	Excess or (deficit) for the year per financial statements. Combine lines 3 and 9 .........	10	4,022,335

Part XII Reconciliation of Revenue per Audited Financial Statements With Revenue per Return
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 on investments ..........	2a
b	Donated services and use of facilities .........	2b
c	Recoveries of prior year grants ...........	2c
d	Other (Describe in Part XIV): ............	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 XIV): ...........	4b
c	Add lines 4a and 4b.......................		4c
5	Total Revenue. Add lines 3 and 4c. (This should equal Form 990, Part I, line 12.) ......		5

Part XIII Reconciliation of Expenses per Audited Financial Statements With Expenses per Return
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 XIV): ............	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 XIV): ............	4b
c	Add lines 4a and 4b.......................		4c
5	Total expenses. Add lines 3 and 4c. (This should equal Form 990, Part I, line 18.) ......		5

Part XIV

Supplemental Information

Complete this part to 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; Part XI, line 8; Part XII, lines 2d and 4b; and Part XIII, lines 2d and 4b. Also complete this part to provide any additional information.

Identifier	Return Reference	Explanation
DESCRIPTION OF INTENDED USE OF ENDOWMENT FUNDS:	PART V, LINE 4:	ASTRO'S BOARD DESIGNATED NET ASSETS HAVE BEEN BOARD APPROVED FOR VARIOUS PURPOSES INCLUDING: 1) ITS COMMITMENT TO ITS AFFILIATE'S VISION OF VALUE CAMPAIGN, 2)RESERVE FOR AN UNANTICIPATED CANCELLATION OF A FUTURE ANNUAL CONFERENCE, 3) AN ASSOCIATION MANAGEMENT SYSTEMS, AND 4) OTHER PROGRAMS.

Schedule D (Form 990) 2010

Additional Data

Software ID:
Software Version:

- TIN:

SCHEDULE F
(Form 990)

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 pointing arrow large image

Attach to Form 990. Right pointing arrow large image

See separate instructions.

OMB No. 1545-0047

2010

Open to Public Inspection

Name of the organization
AMERICAN SOCIETY FOR RADIATION ONCOLOGY

Employer identification number

42-0943164

Part I

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

For grantmakers. 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

For grantmakers. Describe in Part V the organization’s procedures for monitoring the use of grant funds outside the
United States.

Activites per Region. (Use Part V if additional space is needed.)

(a) Region		(b) Number of offices in the region	(c) Number of employees or agents in region or independent contractors	(d) Activities conducted in region (by type) (e.g., 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 region	(f) Total expenditures for region/investments in region
	EUROPE (INCLUDING ICELAND & GREENLAND)	0	0	PROGRAM SERVICES.	DEVELOPMENT OF TEST TOOLS FOR IHE-RO CONNECTATHON.	101,842
















3a	Sub-total .....		0			101,842
b	Total from continuation sheets to Part I ...		0			0
c	Totals (add lines 3a and 3b)		0			101,842

For Privacy Act and Paperwork Reduction Act Notice, see the Instructions for Form 990.Cat. No. 50082W Schedule F (Form 990) 2010

Schedule F (Form 990) 2010

Page 2

Part II

Grants and Other Assistance to Organizations or Entities Outside the United States. Complete if the organization answered "Yes" to Form 990,

Part IV, line 15, for any recipient who received more than $5,000. Check this box if no one recipient received more than $5,000 ........ MediumBullet

Use Part V 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 of non-cash assistance	(h) Description of non-cash assistance	(i) Method of valuation (book, FMV, appraisal, other)

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 ..... MediumBullet

Enter total number of other organizations or entities ........................ MediumBullet

Schedule F (Form 990) 2010

Schedule F (Form 990) 2010Page 3

Part III

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

Use Part V if additional space is needed.

(a) Type of grant or assistance		(b) Region	(c) Number of recipients	(d) Amount of cash grant	(e) Manner of cash disbursement	(f) Amount of non-cash assistance	(g) Description of non-cash assistance	(h) Method of valuation (book, FMV, appraisal, other)

Schedule F (Form 990) 2010

Page 4

Part IV

Foreign Forms

Schedule F (Form 990) 2010

Page 5

Part V

Supplemental Information
Complete this part to provide the information (see instructions) required in Part I, line 2, and any additional information.

Identifier	ReturnReference	Explanation

Schedule F (Form 990) 2010

Additional Data

Software ID:
Software Version:

- TIN:

Schedule J
(Form 990)

Department of the Treasury
Internal Revenue Service

Compensation Information

For certain Officers, Directors, Trustees, Key Employees, and Highest
Compensated Employees
SchJMediumBullet

Complete if the organization answered "Yes" to Form 990,
Part IV, question 23.
SchJMediumBullet

Attach to Form 990. SchJMediumBullet

See separate instructions.

OMB No. 1545-0047

2010

Open to Public Inspection

Name of the organization

AMERICAN SOCIETY FOR RADIATION ONCOLOGY

Employer identification number

42-0943164

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 in 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 in line 1a are checked, did the organization follow a written policy regarding payment or reimbursement orprovision of all 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
officers, directors, trustees, and the CEO/Executive Director, regarding the items checked in line 1a? ....

Indicate which, if any, of the following the organization uses to establish the compensation of the
organization's CEO/Executive Director. Check all that apply.

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 in 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) and 501(c)(4) organizations only must complete lines 5-9.

For persons listed in 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," to line 5a or 5b, describe in Part III.

For persons listed in 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," to line 6a or 6b, describe in Part III.

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

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

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

For Privacy Act and Paperwork Reduction Act Notice, see the Intructions for Form 990

Cat. No. 50053T

Schedule J (Form 990) 2010

Page 2

Part II

Officers, Directors, Trustees, Key Employees, and Highest Compensated Employees. Use Schedule J-1 if additional space needed.

For each individual whose compensation must be reported in 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) must equal the applicable column (D) or column (E) amounts on Form 990, Part VII, line 1a.

(A) Name		(B) Breakdown of W-2 and/or 1099-MISC compensation			(C) Retirement and other deferred compensation	(D) Nontaxable benefits	(E) Total of columns (B)(i)-(D)	(F) Compensation reported in prior Form 990 or Form 990-EZ
(A) Name		(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)
(1) LAURA I THEVENOT	(i) (ii)	402,830 0	34,311 0	0 0	41,000 0	0 0	478,141 0	0 0

Schedule J (Form 990) 2010

Page 3

Part III

Supplemental Information

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

Identifier	Return Reference	Explanation

Schedule J (Form 990) 2010

Additional Data

Software ID:
Software Version:

- TIN:

SCHEDULE O
(Form 990 or 990-EZ)

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 to provide any additional information.
MediumBullet

Attach to Form 990 or 990-EZ.

OMB No. 1545-0047

2010

Open to Public
Inspection

Name of the organization

AMERICAN SOCIETY FOR RADIATION ONCOLOGY

Employer identification number

42-0943164

Identifier	Return Reference	Explanation
FORM 990, PART VI, SECTION A, LINE 6		ASTRO IS A NOT-FOR-PROFIT WITH MEMBERS.
FORM 990, PART VI, SECTION A, LINE 7A		MEMBERS ELECT THE BOARD OF DIRECTORS.
FORM 990, PART VI, SECTION A, LINE 7B		CHANGES TO THE BYLAWS.
FORM 990, PART VI, SECTION B, LINE 11		DEVELOPED BY AUDITORS; REVIEWED BY FINANCE STAFF; APPROVED BY CFO, CEO AND LEGAL COUNSEL.
	FORM 990, PART VI, SECTION B, LINE 12C	POLICY REVIEWED ON YEARLY BASIS.
	FORM 990, PART VI, SECTION B, LINE 15	INDEPENDENT CONSULTANT PERFORMED SALARY SURVEY TO DEVELOP SALARY STRUCTURE AND RANGES.
	FORM 990, PART VI, SECTION C, LINE 18	ANNUAL REPORT WITH SUMMARY FINANCIAL STATEMENTS DISTRIBUTED TO MEMBERS AND AVAILABLE TO MEMEBERS ON ASTRO WEB SITE, GOVERNING DOCUMENTS AND CONFLICT OF INTEREST POLICY AVAIALABLE TO MEMBERS ON ASRTO WEBSITE.
	FORM 990, PART VI, SECTION C, LINE 19	NOT AVAILABLE TO THE PUBLIC.
ALL OTHER FUNCTIONAL EXPENSES	FORM 990, PART X, LINE 24F	EQUIPMENT RENTAL AND MAINTENANCE: TOTAL EXPENSES 354,817. PRINTING AND COPYING: TOTAL EXPENSES 313,924. HONORARIA: TOTAL EXPENSES 234,000. BUS AND LIMO SERVICE: TOTAL EXPENSES 177,629. POSTAGE AND DELIVERY: TOTAL EXPENSES 163,997. INVESTMENT MANAGEMENT FEES: TOTAL EXPENSES 136,838. DUES AND PUBLICATIONS: TOTAL EXPENSES 112,973. TELEPHONE: TOTAL EXPENSES 84,865. AWARDS: TOTAL EXPENSES 59,711. SIGNAGE: TOTAL EXPENSES 57,718. ABSTRACT SELECTION: TOTAL EXPENSES 52,934. MESSAGING SERVICE: TOTAL EXPENSES 52,300. TEMPORARY HELP: TOTAL EXPENSES 32,819. HUMAN RESOURCE SERVICES: TOTAL EXPENSES 25,723. RECRUITING: TOTAL EXPENSES 21,558. BANK FEES: TOTAL EXPENSES 21,070. CONTINUING EDUCATION: TOTAL EXPENSES 16,840. EMPLOYEE RETENTION: TOTAL EXPENSES 11,045. TECHNICAL SUPPORT: TOTAL EXPENSES 199.
CHANGES IN NET ASSETS OR FUND BALANCES:	FORM 990, PART XI, LINE 5:	NET UNREALIZED GAINS ON INVESTMENTS: 2,288,252.

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

Cat. No. 51056K

Schedule O (Form 990 or 990-EZ) 2010

Additional Data

Software ID:
Software Version:

- TIN:

SCHEDULE R
(Form 990)

Department of the Treasury
Internal Revenue Service

Related Organizations and Unrelated Partnerships

Complete if the organization answered "Yes" to Form 990, Part IV, line 33, 34, 35, 36, or 37.
MediumBullet

Attach to Form 990. MediumBullet

See separate instructions.

OMB No. 1545-0047

2010

Open to Public Inspection

Name of the organization

AMERICAN SOCIETY FOR RADIATION ONCOLOGY

Employer identification number

42-0943164

Part I

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

(a) Name, address, and EIN 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 organization
(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) RADIATION ONCOLOGY INSTITUTE 8280 WILLOW OAKS CORPORATE DRIVE SU FAIRFAX,VA22031 51-0178702		VA	501(C)(3)				No

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

Cat. No. 50135Y

Schedule R (Form 990) 2010

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 VUBI amount in box 20 of Schedule K-1 (Form 1065)	(j) General or managing partner?
(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 VUBI amount in box 20 of Schedule K-1 (Form 1065)	Yes	No

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

Schedule R (Form 990) 2010

Page 3

Part V

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

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

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 (iv) rent from a controlled entity . . . . . . . . . . . . . . . . . . . . . . .

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

Yes

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

Yes

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

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

f Sale of assets to other organization(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

g Purchase of assets from other organization(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

h Exchange of assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

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

k Performance of services or membership or fundraising solicitations for other organization(s) . . . . . . . . . . . . . . . . . . . . . .

l Performance of services or membership or fundraising solicitations by other organization(s) . . . . . . . . . . . . . . . . . . . . . .

m Sharing of facilities, equipment, mailing lists, or other assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Yes

n Sharing of paid employees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

o Reimbursement paid to other organization for expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

p Reimbursement paid by other organization for expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

q Other transfer of cash or property to other organization(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

r Other transfer of cash or property from other 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 other organization	(b) Transaction type(a-r)	(c) Amount involved
(1) RADIATION ONCOLOGY INSTITUTE	B	751,171
(2) RADIATION ONCOLOGY INSTITUTE	C	24,105
(3) RADIATION ONCOLOGY INSTITUTE	M	54,721
(4)
(5)
(6)

Schedule R (Form 990) 2010

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

Schedule R (Form 990) 2010

Page 5

Part VII

Supplemental Information

Complete this part to provide additional information for responses to questions on Schedule R (see instructions).

Identifier	Return Reference	Explanation

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 (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 file Form 3520 and/or Form 3520-A. (see instructions for Forms 3520 and 3520-A)..........	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, 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 file Form 5713, International Boycott Report (see instructions for Form 5713)................................................	Yes	No