Skip to main content
IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 36-4628768

THE RADIOSURGERY SOCIETY

Tax-exempt · SAN JOSE, CA 95113

Financials

$1.2M$1.1M2023$1.2M$1.1M2024
Revenue Expenses · by fiscal year end
Financials of THE RADIOSURGERY SOCIETY by year, from its e-filed returns
Year endedFormRevenueExpensesNet incomeTotal assetsLiabilitiesNet assets
June 30, 2025990$1,182,529$1,102,860$79,669$2,081,568$68,951$2,012,617
June 30, 2024990$1,214,745$1,063,811$150,934$1,989,652$137,465$1,852,187
Financial details: 990 for the year ended June 30, 2025

Revenue

Contributions, gifts and grants
$633,796
Membership dues
$98,296
Program service revenue
$538,922
Investment income
$9,811
Other revenue
$0

Expenses

Grants and similar amounts paid
$0
Compensation of officers, directors and key employees
$160,555
Other salaries and wages
$79,592
Salaries, compensation and benefits (total)
$260,263
Professional fundraising fees
$0
Legal fees
$3,300
Accounting fees
$44,712
Occupancy
$6,977
Travel
$7,312
Program services (functional)
$815,662
Management and general (functional)
$287,198

Balance sheet and other

Total assets, start of year
$1,989,652
Total assets, end of year
$2,081,568
Total liabilities, end of year
$68,951
Net assets, end of year
$2,012,617
Publicly traded securities
$1,100,883
Net assets without donor restrictions
$2,012,617
Gross receipts
$1,182,529
Employees
3
Volunteers
51
Year formed
2008
State of legal domicile
CA

From the e-filed returns the IRS publishes as XML (latest three processing years; amended returns replace the original). PDF copies at the IRS.

Officers, directors and key employees

As listed on the 990 for the year ended June 30, 2025, highest compensation first.

NameTitleHours / weekCompensation
JOANNE DAVIS PhDEXECUTIVE DIRECTOR
Trustee or director, Officer, Key employee, Highest-paid employee
40$160,555
NAJEEB MOHIDEEN MDCHAIRPERSON OF THE BOARD
Trustee or director
5$0
BEREND SLOTMAN MD PHDPRESIDENT OF THE BOARD
Trustee or director, Officer
5$0
JOHN J KRESL MD PHDPRESIDENT ELECT
Trustee or director, Officer
2$0
PERCY LEETREASURER
Trustee or director, Officer
2$0
HELEN SHIH MDSECRETARY
Trustee or director, Officer
2$0
PANTALEO ROMANELLI MDNEUROSURGERY OFFICER
Trustee or director
2$0
MATTHEW PODGORSAK PhDMEDICAL PHYSICS DIRECTOR
Trustee or director
2$0
STANLEY BENEDICT PHDBOARD MEMBER
Trustee or director
2$0
IRIS GIBBS MDBOARD MEMBER
Trustee or director
1$0
SIMON S LO MDBOARD MEMBER
Trustee or director
1$0
SHANKAR SIVA MDBOARD MEMBER
Trustee or director
1$0
JONATHAN HAAS MDBOARD MEMBER
Trustee or director
1$0
990 for the year ended June 30, 2024: 13 people
NameTitleHours / weekCompensation
JOANNE DAVIS PHDEXECUTIVE DIRECTOR
Trustee or director, Key employee, Highest-paid employee
40$148,371
NAJEEB MOHIDEEN MDCHAIRPERSON OF THE BOARD
Trustee or director, Officer
5$0
BEN SLOTMAN MD PHDPRESIDENT OF THE BOARD
Trustee or director, Officer
5$0
JOHN J KRESL MD PHDPRESIDENT ELECT
Trustee or director, Officer
5$0
PERCY LEETREASURER
Trustee or director, Officer
2$0
HELEN SHIH MDSECRETARY
Trustee or director, Officer
2$0
GRACE GWE-YA KIM PHDMEDICAL PHYSICS OFFICER
Trustee or director
2$0
PANTALEO ROMANELLI MDNEUROSURGERY OFFICER
Trustee or director
2$0
STANLEY BENEDICT PHDBOARD MEMBER
Trustee or director
1$0
IRIS GIBBS MDBOARD MEMBER
Trustee or director
1$0
SIMON S LO MDBOARD MEMBER
Trustee or director
1$0
SHANKAR SIVA MDBOARD MEMBER
Trustee or director
1$0
SHALOM KALNICKI MDEMERITUS BOARD MEMBER
Trustee or director
1$0

Address and contacts

Address (IRS master file)
99 ALMADEN BLVD STE 600, SAN JOSE, CA 95113-1605
In care of
% JOANNE DAVIS
Principal officer (990 for 2024)
JOANNE DAVIS PHD, 99 ALMADEN BLVD STE 600, SAN JOSE, CA 95113
Signed the 990
JOANNE DAVIS PHD, EXECUTIVE DIRECTOR
Phone
(408) 385-9411
Return prepared by
The Willet Circle

California records

California keeps its own records of charities and corporations. Search them by EIN 36-4628768 or by the name THE RADIOSURGERY SOCIETY.

Attorney General, Registry of Charities and Fundraisers
Registration status and filed reports (CT-TR-1, RRF-1)

Mission

The Radiosurgery Society is a multi-disciplinary non-profit organization, consisting of surgeons, radiation oncologists, physicists, and allied health professionals, who are dedicated to advancing the science and clinical practice of SRS, SBRT and advancing therapies. ..

990 for the year ended June 30, 2025

Program accomplishments

  • EDUCATIONAL RESOURCES - 1. Webinar Series. Ongoing series of educational web-conferences. Sessions are provided live to all and via recording to RSS members. Continuing Medical Education Credits (CE) are awarded to physicians, nurses and medical physicists who attend the live session. 2 Dosimetry Plan Library. An online tool to educate physicians, medical physicists and dosimetrists on SRS/SBRT treatment planning techniques. Example cases are available to members for download to practice SRS/SBRT treatment planning techniques and compare with reference plans created by an expert panel. 3. Resident Program. Residents and faculty advisors meet monthly to develop educational and professional development programs including webinars, workshops, mentorship & career pathways program and research projects to the professional development of residents, students and trainees in the field of SRS, SBRT and advancing therapies. 4. Distinction in Stereotactic Radiotherapy accreditation program. The Distinction in Stereotactic Radiotherapy program focuses on practice standards, patient management and medical physics aspects unique to SRS/SBRT treatment. The program was designed by professional peers with extensive experience treating patients with SRS/SBRT, with the aim to identify standards indicative of a quality practice in the field of SRS/SBRT
    Expenses $182,595 · revenue $547,993
  • RESEARCH PROGRAMS - 1. RSSearch Patient Registry Publications. Online, multi-platform database dedicated to the collection of screening, treatment and follow-up data from patients treated with SRS, SBRT and advancing therapies. 2. RSS Online Journal . The RSS manages the content of a channel within the Cureus Journal of Medical Science (www.cureus.com). We coordinate the peer-review submission process, solicit manuscripts for publication and publish accepted abstracts from the RSS Scientific Meetings. The RSS also works with the Journal of Neuro-Oncology. 3. GRID, LATTICE, FLASH and Microbeam Working Group. RSS members and experts in GRID, LATTICE, FLASH and Microbeam meet monthly to address the clinical and scientific facets of these therapies with a goal of conducting research to advance clinical treatments for patients. 4. Functional Radiosurgery Working Group. RSS members, physicians, medical physicists and health care providers specializing in functional radiosurgery meet monthly to develop educational and training programs to advance clinical treatments for patients with functional diseases. 5. Website. Host information about and provide access to all RSS programs, resources and events. 6. Neurosurgery Committee - RSS members and experts in the field of neurosurgery meet monthly to address the clinical and technical aspects of stereotactic radiosurgery (SRS) with the goal of developing educational and training programs to advance clinical treatments for patients treated with SRS.
    Expenses $111,966 · revenue $92,626
  • RSS SCIENTIFIC MEETINGS AND WORKSHOPS - Advances in applications, technologies and methodologies of SRS, SBRT and advancing therapies continue to evolve rapidly, creating a need for continual learning. The RSS hosts national and international meetings to disseminate new scientific findings and technical innovations and expand basic knowledge relevant to clinical practice and improve patient outcomes. The educational elements are targeted to radiation oncologists, neurosurgeons, oncologists of all disciplines, medical physicists, nurses, therapists, residents, students and other professionals involved in radiotherapy. Attendees receive state-of-the-art practice information relating to radiation and oncology. The RSS hosted the workshop "Navigating the Emergence of Radioligand Therapy" on November 21, 2024 at Albert Einstein College of Medicine, Bronx, NY. The RSS hosted the "Functional Radiosurgery Workshop" on March 19, 2025 in Tucson, AZ. The RSS hosted the symposia "Advancements in GRID, Lattice, Microbeam and FLASH" on March 19, 2025, in Tucson, AZ. The 2025 RSS Scientific Meeting "Expanding Horizons in SRS, SBRT and Other Advanced Radiotherapy Techniques" was held March 20-22, 2025 in Tucson, AZ.
    Expenses $521,101 · revenue $508,629

What it must file and when

IRS records say it files Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N. Its accounting year ends in June, so each return is due on the 15th day of the 5th month after that.

Tax yearYear endedDueIRS public records
2025June 30, 2026November 16, 2026Not due yet
2024June 30, 2025November 17, 2025990 on file
2023June 30, 2024November 15, 2024990 on file

IRS record

EIN
36-4628768
Tax-exempt status
501(c)(6): Business league or chamber of commerce
Donations deductible
No
Exempt since
2009
Accounting year ends
June
Files
Form 990 or 990-EZ
Assets (IRS master file)
$2,081,568
Income (IRS master file)
$1,182,529

Filing history

FormYear endedRevenueExpensesAssetsReturn
990June 2025$1,182,529$1,102,860$2,081,568IRS
990June 2024$1,214,745$1,063,811$1,989,652XML
990June 2023$1,309,749$1,011,765$1,866,124IRS
990June 2022–––IRS
990June 2021–––IRS
990June 2019–––IRS

990-N: the IRS bulk file holds only the latest e-Postcard per organization; earlier years come from archived copies of that file since 2020 and can have gaps (the IRS e-Postcard search lists every one). 990, 990-EZ, 990-PF, 990-T: every e-filed return in the IRS e-file index since 2019; XML for the latest three processing years, amounts from the IRS Statistics of Income extracts before that. PDF copies and determination letters at the IRS (search EIN 36-4628768).

Questions about THE RADIOSURGERY SOCIETY

What is the EIN of THE RADIOSURGERY SOCIETY?
The employer identification number (EIN) of THE RADIOSURGERY SOCIETY is 36-4628768.
Is THE RADIOSURGERY SOCIETY tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(6) since 2009.
Are donations to THE RADIOSURGERY SOCIETY tax-deductible?
No. The IRS master file says contributions to it are not deductible.
Which annual return does THE RADIOSURGERY SOCIETY file?
Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N.
When is the next return of THE RADIOSURGERY SOCIETY due?
The return for tax year 2025 (the year ending June 30, 2026) is due November 16, 2026. Form 8868 extends it by six months; the 990-N cannot be extended.
When did THE RADIOSURGERY SOCIETY last file with the IRS?
The latest return in the IRS public files is the 990 for the year ended June 2025.
Who is the principal officer of THE RADIOSURGERY SOCIETY?
The 990 for the year ended June 30, 2025 names JOANNE DAVIS PHD.
Who are the officers and directors of THE RADIOSURGERY SOCIETY?
The 990 for the year ended June 30, 2025 lists 13 people; 1 received compensation from the organization, the highest $160,555 (JOANNE DAVIS PhD, EXECUTIVE DIRECTOR).
How much revenue does THE RADIOSURGERY SOCIETY have?
On its 990 for the year ended June 30, 2025 it reported revenue of $1,182,529, expenses of $1,102,860 and total assets of $2,081,568 at year end.

Other nonprofits in SAN JOSE

All nonprofits in SAN JOSE · California · Community improvement and capacity building