Nonprofit · EIN 99-4061663
ONTARIO COUNTY MEDICAL SOCIETY INCORPORATED
Tax-exempt · ROCHESTER, NY 14692
Address and contacts
- Address (IRS master file)
- PO BOX 22894, ROCHESTER, NY 14692-2894
- In care of
- % MARK RYAN MD
- Mailing address (990-N for 2025)
- PO Box 22894, Rochester NY 14692
- Principal officer (990-N for 2025)
- Mark Ryan MD, 7 Greenpoint Trail, Pittsford NY 14534
What it must file and when
IRS records say it files Form 990-N (e-Postcard). Gross receipts normally $50,000 or less. Its accounting year ends in December, so each return is due on the 15th day of the 5th month after that.
| Tax year | Year ended | Due | IRS public records |
|---|---|---|---|
| 2025 | December 31, 2025 | May 15, 2026 | 990-N on file |
| 2024 | December 31, 2024 | May 15, 2025 | 990-N on file |
| 2023 | December 31, 2023 | May 15, 2024 | Check at the IRS |
IRS record
- EIN
- 99-4061663
- Tax-exempt status
- 501(c)(6): Business league or chamber of commerce
- Donations deductible
- No
- Exempt since
- 2026
- Accounting year ends
- December
- Files
- Form 990-N (e-Postcard)
- Category (NTEE)
- Health care (E03)
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990-N for 2025 Officer: Mark Ryan MD | December 31, 2025 | ≤ $50,000 receipts | – | – | e-Postcard |
| 990-N for 2024 Officer: Mark Ryan MD | December 31, 2024 | ≤ $50,000 receipts | – | – | e-Postcard |
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 99-4061663).
Questions about ONTARIO COUNTY MEDICAL SOCIETY INCORPORATED
- What is the EIN of ONTARIO COUNTY MEDICAL SOCIETY INCORPORATED?
- The employer identification number (EIN) of ONTARIO COUNTY MEDICAL SOCIETY INCORPORATED is 99-4061663.
- Is ONTARIO COUNTY MEDICAL SOCIETY INCORPORATED tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(6) since 2026.
- Are donations to ONTARIO COUNTY MEDICAL SOCIETY INCORPORATED tax-deductible?
- No. The IRS master file says contributions to it are not deductible.
- Which annual return does ONTARIO COUNTY MEDICAL SOCIETY INCORPORATED file?
- Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
- When is the next return of ONTARIO COUNTY MEDICAL SOCIETY INCORPORATED due?
- The return for tax year 2026 (the year ending December 31, 2026) is due May 17, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
- When did ONTARIO COUNTY MEDICAL SOCIETY INCORPORATED last file with the IRS?
- The latest return in the IRS public files is the 990-N for 2025 for the year ended December 31, 2025.
- Who is the principal officer of ONTARIO COUNTY MEDICAL SOCIETY INCORPORATED?
- The 990-N for 2025 names Mark Ryan MD.
Other nonprofits in ROCHESTER
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- THE UNITY HOSPITAL OF ROCHESTER EIN 23-7221763 · last filed 990 for 2024
- HIGHLAND HOSPITAL OF ROCHESTER EIN 16-0743037 · last filed 990 for 2025
- UNITED MEMORIAL MEDICAL CENTER EIN 16-0743029 · last filed 990 for 2024
- CLIFTON SPRINGS SANITARIUM CO EIN 16-0743966 · last filed 990 for 2024
- WESTERN NEW YORK MEDICAL PRACTICE PC EIN 61-1654232 · last filed 990 for 2024
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- GENESEE REGION HOME CARE ASSOCIATION INC EIN 16-0844109 · last filed 990 for 2024