International Stereotactic Radio Surgery Society
Public records raise at least one point you should look into before giving.
What it says it does
THE INTERNATIONAL STEREOTACTIC RADIOSURGERY SOCIETY (ISRS) WAS FOUNDED AS A WORLDWIDE ORGANIZATION IN 1991 AND REMAINS THE ONLY PROFESSIONAL BODY OF ITS KIND. CREATED TO FOSTER LEARNING AND RESEARCH ON THE TOPICS OF BRAIN AND BODY RADIOSURGERY, THE SOCIETY IS HIGHLY DEDICATED TO: 1. PROMOTING TECHNICAL DEVELOPMENTS IN STEREOTACTIC RADIOSURGERY 2. PROMOTING THE HIGHEST LEVELS OF CLINICAL EXPERTISE 3. CONVENING EVERY TWO YEARS AT THE ISRS CONGRESS. THE ISRS FOSTERS TECHNICAL DEVELOPMENT AND RESEARCH ON THE TOPICS OF BRAIN AND BODY RADIOSURGERY BY HOLDING BIENNIAL CONGRESSES, MAINTAINING A WEBSITE, AND OTHER ACTIVITIES TO ENCOURAGE THE EXCHANGE OF INFORMATION.
- Income
- $404,880
- Spending
- $254,344
- Employees
- 0
Source: Form 990 for the year ending September 30, 2025, filed with the Internal Revenue Service. How we rate
Financial health
We do not score finances when yearly spending is very small or the return has too little detail. The ratios stop meaning much at that size.
Source: Form 990 for the year ending September 30, 2025, filed with the Internal Revenue Service. How we rate
Governance
This return does not answer enough of the governance questions to score.
Source: Form 990 for the year ending September 30, 2025, filed with the Internal Revenue Service. How we rate
Impact evidence
Describes programs. Its tax return describes what it does but we have found no measurable results in it.
Programs described in its return (3)
- THE ISRS ORGANIZES AND HOLDS A BIENNIAL CONGRESS TO ENCOURAGE INTERACTION AMONG INTERNATIONAL COMMUNITIES OF HEALTHCARE PROFESSIONALS DEDICATED TO THE ADVANCEMENT OF STEREOTACTIC RADIOSURGERY AND TO GIVE THEM THE OPPORTUNITY TO BROADEN AND DEVELOP THEIR KNOWLEDGE WITH FELLOW PROFESSIONALS. IN ADDITION TO OTHER ACTIVITIES AT THE BIENNIAL CONGRESS, THE ISRS MAKES CERTAIN AWARDS FOR CONTRIBUTIONS IN THE FIELD OF RADIOSURGERY, SCIENTIFIC PAPERS, AND POSTERS. DURING THIS YEAR, THE ORGANIZATION WAS PREPARING FOR ITS NEXT CONGRESS, TO BE HELD IN MAY 2026 IN SYDNEY, AUSTRALIA. OVER 700 NEUROSURGEIONS, RADIATION ONCOLOGISTS, MEDICAL PHYSICISTS, AND OTHERS FROM OVER 55 COUNTRIES WERE PRESENT AT THE MAY, 2024 BIENNIAL CONGRESS IN NEW YORK CITY. IN ALTERNATE YEARS, ISRS ORGANIZES INTERIM MEETINGS TO MAINTAIN CURRENCY IN EDUCATION FOR ITS MEMBERS. THE ISRS ORGANIZES AND HOLDS A BIENNIAL CONGRESS TO ENCOURAGE INTERACTION AMONG INTERNATIONAL COMMUNITIES OF HEALTHCARE PROFESSIONALS DEDICATED TO THE ADVANCEMENT OF STEREOTACTIC RADIOSURGERY AND TO GIVE THEM THE OPPORTUNITY TO BROADEN AND DEVELOP THEIR KNOWLEDGE WITH FELLOW PROFESSIONALS. IN ADDITION TO OTHER ACTIVITIES AT THE BIENNIAL CONGRESS, THE ISRS MAKES CERTAIN AWARDS FOR CONTRIBUTIONS IN THE FIELD OF RADIOSURGERY, SCIENTIFIC PAPERS, AND POSTERS. DURING THIS YEAR, THE ORGANIZATION WAS PREPARING FOR ITS NEXT CONGRESS, TO BE HELD IN MAY 2026 IN SYDNEY, AUSTRALIA. OVER 700 NEUROSURGEIONS, RADIATION ONCOLOGISTS, MEDICAL PHYSICISTS, AND OTHERS FROM OVER 55 COUNTRIES WERE PRESENT AT THE MAY, 2024 BIENNIAL CONGRESS IN NEW YORK CITY. IN ALTERNATE YEARS, ISRS ORGANIZES INTERIM MEETINGS TO MAINTAIN CURRENCY IN EDUCATION FOR ITS MEMBERS.
- THE ISRS WEBSITE IS REGULARLY UPDATED WITH NEWSFEEDS TO ATTRACT MORE MEMBERS FROM THE SECTOR. NEWSLETTERS ARE SENT BY EMAIL TO ALL ISRS MEMBERS.
- ISRS ORGANIZES NUMEROUS WEBINARS AS PART OF ITS EDUCATIONAL ACTIVITIES TO EXPAND AND UPDATE ITS MEMBERS' KNOWLEDGE AND SKILL.
Source: Form 990 for the year ending September 30, 2025, filed with the Internal Revenue Service. How we rate
Legitimacy checks
Is it registered with the IRS? Passed.
Listed in the IRS master file of tax-exempt organizations as a 501(c)(6) business league.
Source: Exempt Organizations Business Master File, Internal Revenue Service, file dated October 13, 2026.
Has the IRS revoked its tax-exempt status? Passed.
Not on the IRS automatic revocation list.
Source: Automatic revocation of exemption list, Internal Revenue Service, file dated October 13, 2026.
Are donations tax-deductible? Caution.
The IRS master file records contributions to this 501(c)(6) business league as not deductible.
Source: Exempt Organizations Business Master File, Internal Revenue Service, file dated October 13, 2026.
Is it keeping up with its IRS filings? Passed.
Most recent return on file covers the year ending September 2025.
Source: Exempt Organizations Business Master File, Internal Revenue Service, file dated October 13, 2026.
How long has it been tax-exempt? Passed.
Recognized by the IRS since September 1994.
Source: Exempt Organizations Business Master File, Internal Revenue Service, file dated October 13, 2026.
Is it in good standing with state regulators? Passed.
Not on California's list of charities barred from soliciting. Other states are not yet checked.
Source: May Not Operate or Solicit for Charitable Purposes list, California Attorney General, Registry of Charities and Fundraisers, file dated October 21, 2026.
Ratings and checks are our reading of public records, using the published method. They are not a statement about anyone's honesty. If you work for this organization, you can send corrections or results, confirm you want gifts through Veridonate, or ask to be removed from giving.