Nonprofit · EIN 90-0649293
INTERNATIONAL SOCIETY OF ORTHOPAEDI ORTHOPAEDID CENTERS LTD ISOC INC
Tax-exempt · NEW YORK, NY 10021
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990 | $70,568 | $64,335 | $6,233 | $158,404 | $5,639 | $152,765 |
| December 31, 2024 | 990 | $42,314 | $14,314 | $28,000 | $152,171 | $5,639 | $146,532 |
| December 31, 2023 | 990 | $38,058 | $28,427 | $9,631 | $124,171 | $5,639 | $118,532 |
Financial details: 990 for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $70,568
- Membership dues
- $70,568
- Program service revenue
- $0
- Investment income
- $0
- Other revenue
- $0
Expenses
- Grants and similar amounts paid
- $0
- Salaries, compensation and benefits (total)
- $0
- Professional fundraising fees
- $0
- Accounting fees
- $3,396
- Program services (functional)
- $63,935
- Management and general (functional)
- $400
Balance sheet and other
- Total assets, start of year
- $152,171
- Total assets, end of year
- $158,404
- Total liabilities, end of year
- $5,639
- Net assets, end of year
- $152,765
- Gross receipts
- $70,568
- Employees
- 0
- Volunteers
- 0
- Year formed
- 2009
- State of legal domicile
- NY
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 December 31, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| MATHIAS BOSTROM | DIRECTOR Trustee or director | 0 | $0 |
| BRIANA BLOOM | OFFICER Officer | 0 | $0 |
990 for the year ended December 31, 2024: 2 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| MATHIAS BOSTROM | DIRECTOR Trustee or director | 0 | $0 |
| LAURA ROBBINS | OFFICER Officer | 0 | $0 |
990 for the year ended December 31, 2023: 2 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| MATHIAS BOSTROM | DIRECTOR Trustee or director | 0 | $0 |
| LAURA ROBBINS | OFFICER Officer | 0 | $0 |
Address and contacts
- Address (IRS master file)
- 535 E 70TH ST, NEW YORK, NY 10021-4823
- In care of
- % ILSA KLINGHOFFER
- Principal officer (990 for 2025)
- MATHIAS BOSTROM, 535 E 70TH ST, NEW YORK, NY 10021
- Signed the 990
- MATHIAS BOSTROM, DIRECTOR
- Phone
- (212) 774-2315
- Website
- WWW.ISOCWEB.ORG
- Return prepared by
- LESHKOWITZ & COMPANY LLP
Mission
THE SOCIETY'S MISSION IS TO SHARE KNOWLEDGE AND STRATEGIES, IMPROVE PATIENT CARE, AND FOSTER CLINICAL,EDUCATIONAL, AND SCIENTIFIC COLLABORATION.
Program accomplishments
- 1) A CROSS-INSTITUTIONAL STUDY TO ANALYZE AND COMPARE PATIENT PATHWAYS2) AN INTERNATIONAL FELLOWSHIP PROGRAM FOR PHYSICIANS TO VISIT ISOC CENTERS3) CHARITY MISSION IN HOST COUNTRY AND/OR SUPPORT FOR AND PARTNERSHIP WITH INTERNATIONAL HEALTH ORGANIZATIONSExpenses $63,935 · revenue $70,568
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 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 on file |
| 2024 | December 31, 2024 | May 15, 2025 | 990 on file |
| 2023 | December 31, 2023 | May 15, 2024 | 990 on file |
IRS record
- EIN
- 90-0649293
- Tax-exempt status
- 501(c)(3): Charitable, religious, educational or scientific organization
- Foundation status
- Publicly supported organization (509(a)(2))
- Donations deductible (Pub 78)
- Public charity, 50% deduction limit
- Exempt since
- 2014
- Accounting year ends
- December
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Voluntary health associations and medical disciplines (G50)
- Assets (IRS master file)
- $158,404
- Income (IRS master file)
- $70,568
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | December 2025 | $70,568 | $64,335 | $158,404 | XML |
| 990 | December 2024 | $42,314 | $14,314 | $152,171 | XML |
| 990 | December 2023 | $38,058 | $28,427 | $124,171 | XML |
| 990 | December 2022 | $73,520 | $36,178 | $114,540 | IRS |
| 990 | December 2021 | – | – | – | IRS |
| 990 | December 2020 | – | – | – | IRS |
| 990 | December 2019 | – | – | – | IRS |
| 990 | December 2018 | – | – | – | 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 90-0649293).
Questions about INTERNATIONAL SOCIETY OF ORTHOPAEDI ORTHOPAEDID CENTERS LTD ISOC INC
- What is the EIN of INTERNATIONAL SOCIETY OF ORTHOPAEDI ORTHOPAEDID CENTERS LTD ISOC INC?
- The employer identification number (EIN) of INTERNATIONAL SOCIETY OF ORTHOPAEDI ORTHOPAEDID CENTERS LTD ISOC INC is 90-0649293.
- Is INTERNATIONAL SOCIETY OF ORTHOPAEDI ORTHOPAEDID CENTERS LTD ISOC INC tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2014.
- Are donations to INTERNATIONAL SOCIETY OF ORTHOPAEDI ORTHOPAEDID CENTERS LTD ISOC INC tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does INTERNATIONAL SOCIETY OF ORTHOPAEDI ORTHOPAEDID CENTERS LTD ISOC INC 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 INTERNATIONAL SOCIETY OF ORTHOPAEDI ORTHOPAEDID CENTERS LTD ISOC INC 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 INTERNATIONAL SOCIETY OF ORTHOPAEDI ORTHOPAEDID CENTERS LTD ISOC INC last file with the IRS?
- The latest return in the IRS public files is the 990 for the year ended December 2025.
- Who is the principal officer of INTERNATIONAL SOCIETY OF ORTHOPAEDI ORTHOPAEDID CENTERS LTD ISOC INC?
- The 990 for the year ended December 31, 2025 names MATHIAS BOSTROM.
- Who are the officers and directors of INTERNATIONAL SOCIETY OF ORTHOPAEDI ORTHOPAEDID CENTERS LTD ISOC INC?
- The 990 for the year ended December 31, 2025 lists 2 people; 0 received compensation from the organization.
- How much revenue does INTERNATIONAL SOCIETY OF ORTHOPAEDI ORTHOPAEDID CENTERS LTD ISOC INC have?
- On its 990 for the year ended December 31, 2025 it reported revenue of $70,568, expenses of $64,335 and total assets of $158,404 at year end.
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