INTERNATIONAL SOCIETY OF ORTHOPAEDI ORTHOPAEDID CENTERS LTD ISOC INC
Cite this
Plain text INTERNATIONAL SOCIETY OF ORTHOPAEDI ORTHOPAEDID CENTERS LTD ISOC INC. Strategy Studio, nonprofit organization profile, tax years 2014–2025. https://strategystudio.org/org/900649293. Retrieved 2026-10-19.
APA Strategy Studio. (n.d.). INTERNATIONAL SOCIETY OF ORTHOPAEDI ORTHOPAEDID CENTERS LTD ISOC INC [Nonprofit organization profile; tax years 2014–2025]. Retrieved October 19, 2026, from https://strategystudio.org/org/900649293
MLA “INTERNATIONAL SOCIETY OF ORTHOPAEDI ORTHOPAEDID CENTERS LTD ISOC INC.” Strategy Studio, tax years 2014–2025, https://strategystudio.org/org/900649293. Accessed 19 Oct. 2026.
Retrieved 2026-10-19; covers tax years 2014–2025. Data: Strategy Studio, CC BY 4.0.
2025 · Form 990 · revenue $71K · expenses $64K · assets $158K
- Also known as
- CENTERS LTD (ISOC INC)
- EIN
- 90-0649293
- Address
- 535 E 70TH ST, NEW YORK, NY 10021-4823
- Website
- WWW.ISOCWEB.ORG
- NTEE code
- G50
- Subsection
- 501(c)(3)
- Ruling year
- 2014
- Cross-check
- ProPublica Nonprofit Explorer
Mission
THE SOCIETY'S MISSION IS TO SHARE KNOWLEDGE AND STRATEGIES, IMPROVE PATIENT CARE, AND FOSTER CLINICAL,EDUCATIONAL, AND SCIENTIFIC COLLABORATION.
Each tax year counts once: when a return was amended, only the latest return for that period is used below (superseded returns stay listed, greyed, under Finances).
People paid by the organization
None of the 4 people listed on these returns reported compensation from the organization. They are listed below.
Officers and directors, no compensation reported
4 people listed on the returns with $0 (or no amount) in every compensation column: current people first. Hours are as filed on the latest return each person appears on.
| Name | Latest title | Years | Hrs/wk (latest) | Compensation | Organizations |
|---|---|---|---|---|---|
| Mathias Bostrom | DIRECTOR | 2015-2025 | 0 | $0 reported | 4 |
| Briana Bloom | OFFICER | 2025 | 0 | $0 reported | 1 |
| Laura Robbins (former) | OFFICER | 2015-2024 | 0 | $0 reported | 1 |
| Thomas Sculco (former) | DIRECTOR | 2014 | 0 | $0 reported | 4 |
People by year
2025 · 2 people listed · none paid · 0 employees · 0 volunteers
| Name | Title | Hrs/wk | From org | From related | Other | Total | Orgs |
|---|---|---|---|---|---|---|---|
| MATHIAS BOSTROM | DIRECTOR | 0 | $0 | $0 | $0 | $0 | 4 |
| BRIANA BLOOM | OFFICER | 0 | $0 | $0 | $0 | $0 | 1 |
2024 · 2 people listed · none paid · 0 employees · 0 volunteers
| Name | Title | Hrs/wk | From org | From related | Other | Total | Orgs |
|---|---|---|---|---|---|---|---|
| MATHIAS BOSTROM | DIRECTOR | 0 | $0 | $0 | $0 | $0 | 4 |
| LAURA ROBBINS | OFFICER | 0 | $0 | $0 | $0 | $0 | 1 |
2023 · 2 people listed · none paid · 0 employees · 0 volunteers
| Name | Title | Hrs/wk | From org | From related | Other | Total | Orgs |
|---|---|---|---|---|---|---|---|
| MATHIAS BOSTROM | DIRECTOR | 0 | $0 | $0 | $0 | $0 | 4 |
| LAURA ROBBINS | OFFICER | 0 | $0 | $0 | $0 | $0 | 1 |
2022 · 2 people listed · none paid · 0 employees · 0 volunteers
| Name | Title | Hrs/wk | From org | From related | Other | Total | Orgs |
|---|---|---|---|---|---|---|---|
| MATHIAS BOSTROM | DIRECTOR | 0 | $0 | $0 | $0 | $0 | 4 |
| LAURA ROBBINS | OFFICER | 0 | $0 | $0 | $0 | $0 | 1 |
2021 · 2 people listed · none paid · 0 employees · 0 volunteers
| Name | Title | Hrs/wk | From org | From related | Other | Total | Orgs |
|---|---|---|---|---|---|---|---|
| MATHIAS BOSTROM | DIRECTOR | 0 | $0 | $0 | $0 | $0 | 4 |
| LAURA ROBBINS | OFFICER | 0 | $0 | $0 | $0 | $0 | 1 |
2020 · 2 people listed · none paid · 0 employees · 0 volunteers
| Name | Title | Hrs/wk | From org | From related | Other | Total | Orgs |
|---|---|---|---|---|---|---|---|
| MATHIAS BOSTROM | DIRECTOR | 0 | $0 | $0 | $0 | $0 | 4 |
| LAURA ROBBINS | OFFICER | 0 | $0 | $0 | $0 | $0 | 1 |
2019 · 2 people listed · none paid · 0 employees · 3 volunteers
| Name | Title | Hrs/wk | From org | From related | Other | Total | Orgs |
|---|---|---|---|---|---|---|---|
| MATHIAS BOSTROM | DIRECTOR | 0 | $0 | $0 | $0 | $0 | 4 |
| LAURA ROBBINS | OFFICER | 0 | $0 | $0 | $0 | $0 | 1 |
2018 · 2 people listed · none paid · 0 employees · 0 volunteers
| Name | Title | Hrs/wk | From org | From related | Other | Total | Orgs |
|---|---|---|---|---|---|---|---|
| MATHIAS BOSTROM | DIRECTOR | 0 | $0 | $0 | $0 | $0 | 4 |
| LAURA ROBBINS | OFFICER | 0 | $0 | $0 | $0 | $0 | 1 |
2017 · 2 people listed · none paid · 0 employees · 0 volunteers
| Name | Title | Hrs/wk | From org | From related | Other | Total | Orgs |
|---|---|---|---|---|---|---|---|
| MATHIAS BOSTROM | DIRECTOR | 0 | $0 | $0 | $0 | $0 | 4 |
| LAURA ROBBINS | OFFICER | 0 | $0 | $0 | $0 | $0 | 1 |
2016 · 2 people listed · none paid · 0 employees · 0 volunteers
| Name | Title | Hrs/wk | From org | From related | Other | Total | Orgs |
|---|---|---|---|---|---|---|---|
| MATHIAS BOSTROM | DIRECTOR | 0 | $0 | $0 | $0 | $0 | 4 |
| LAURA ROBBINS | OFFICER | 0 | $0 | $0 | $0 | $0 | 1 |
2015 · 2 people listed · none paid · 0 employees · 0 volunteers
| Name | Title | Hrs/wk | From org | From related | Other | Total | Orgs |
|---|---|---|---|---|---|---|---|
| MATHIAS BOSTROM | DIRECTOR | 0 | $0 | $0 | $0 | $0 | 4 |
| LAURA ROBBINS | OFFICER | 0 | $0 | $0 | $0 | $0 | 1 |
2014 · 1 person listed · none paid · 0 employees · 0 volunteers
| Name | Title | Hrs/wk | From org | From related | Other | Total | Orgs |
|---|---|---|---|---|---|---|---|
| THOMAS SCULCO | DIRECTOR | 0 | $0 | $0 | $0 | $0 | 4 |
Highest-paid independent contractors
No independent contractors reported.
Who gave
Contributor names are not public for this form type.
Public charities filing Form 990 or 990-EZ report large donors on Schedule B, but the IRS withholds their names and addresses from public copies. Private foundations (990-PF) are different: their contributors are public.
Finances
Newest first. Each filing: its name on one row, its figures on the row beneath. Greyed filings are superseded by a later return for the same period and are left out everywhere else on this page.
| Revenue | Expenses | Assets | Net assets | Contributions | Program revenue | Officer pay | Employees | Volunteers |
|---|---|---|---|---|---|---|---|---|
| 2025 · Form 990 | ||||||||
| $70,568 | $64,335 | $158,404 | $152,765 | $70,568 | $0 | $0 | 0 | 0 |
| 2024 · Form 990 | ||||||||
| $42,314 | $14,314 | $152,171 | $146,532 | $42,314 | $0 | $0 | 0 | 0 |
| 2023 · Form 990 | ||||||||
| $38,058 | $28,427 | $124,171 | $118,532 | $38,058 | $0 | $0 | 0 | 0 |
| 2022 · Form 990 | ||||||||
| $73,520 | $36,178 | $114,540 | $108,901 | $73,520 | $0 | $0 | 0 | 0 |
| 2021 · Form 990 | ||||||||
| $2,463 | $3,189 | $77,198 | $71,559 | $2,463 | $0 | $0 | 0 | 0 |
| 2020 · Form 990 | ||||||||
| $26,783 | $12,015 | $77,924 | $72,285 | $26,783 | $0 | $0 | 0 | 0 |
| 2019 · Form 990 | ||||||||
| $41,154 | $30,211 | $63,156 | $57,517 | $41,154 | $0 | $0 | 0 | 3 |
| 2018 · Form 990 | ||||||||
| $84,599 | $33,971 | $52,213 | $46,574 | $84,599 | $0 | $0 | 0 | 0 |
| 2017 · Form 990 | ||||||||
| $19,019 | $26,764 | $1,585 | -$4,054 | $19,019 | $0 | $0 | 0 | 0 |
| 2016 · Form 990 | ||||||||
| $9,959 | $27,962 | $9,330 | $3,691 | $9,959 | $0 | $0 | 0 | 0 |
| 2015 · Form 990 | ||||||||
| $15,983 | $6,917 | $27,333 | $21,694 | $15,983 | $0 | $0 | 0 | 0 |
| 2014 · Form 990 | ||||||||
| $16,998 | $11,966 | $17,728 | $12,628 | $16,998 | $0 | $0 | 0 | 0 |
Funders of this organization
Not reported: no grants to this organization appear in the filings we have (tax years 2010 to 2025).
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| NATIONAL SPASMODIC TORTICOLLIS ASSOCIATION | CA | G50 | $54,564 | $231,431 | President | $0 | Same NTEE code G50, revenue within 2x |
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Who funds organizations like this
Grantors that funded the 100 most similar organizations. Ranked by total given to them. Foundations (990-PF) and donor-advised fund sponsors only. Same matching as Funders above (by EIN, or by name for foundations).
The full list · all similar organizations
Where the money went
Every expense line on each return, biggest first: Form 990 Part IX (with its program, management and fundraising columns), 990-EZ Part I, or 990-PF Part I. Event marks lines the organization itself describes as events. “Events” in each summary adds those lines, conferences and meetings, and the direct costs of fundraising events. Unusual is not the same as improper. Many of these patterns have ordinary explanations. Check the filing.
2025 · Form 990 · $64,335 spent · pay $0 · grants $0 · events $0
| Line | As described | Total | Program | Management | Fundraising | Share |
|---|---|---|---|---|---|---|
| Other (as described) | CONFERENCE FEES | $60,303 | $60,303 | - | - | 93.7% |
| Fees: accounting | $3,396 | $3,396 | - | - | 5.3% | |
| Other (as described) | BANK FEES | $400 | - | $400 | - | 0.6% |
| Fees: other services | $236 | $236 | - | - | 0.4% | |
| Total | $64,335 | 100% |
2024 · Form 990 · $14,314 spent · pay $0 · grants $0 · events $0
| Line | As described | Total | Program | Management | Fundraising | Share |
|---|---|---|---|---|---|---|
| Other (as described) | CONFERENCE FEES | $10,360 | $10,360 | - | - | 72.4% |
| Fees: accounting | $3,381 | $3,381 | - | - | 23.6% | |
| Other (as described) | BANK FEES | $360 | - | $360 | - | 2.5% |
| Fees: other services | $213 | $213 | - | - | 1.5% | |
| Total | $14,314 | 100% |
2023 · Form 990 · $28,427 spent · pay $0 · grants $0 · events $0
| Line | As described | Total | Program | Management | Fundraising | Share |
|---|---|---|---|---|---|---|
| Other (as described) | CONFERENCE FEES | $11,220 | $11,220 | - | - | 39.5% |
| Other (as described) | TRAVEL | $8,975 | $8,975 | - | - | 31.6% |
| Other (as described) | BUSINESS MEETINGS | $4,585 | $4,585 | - | - | 16.1% |
| Fees: accounting | $3,031 | $3,031 | - | - | 10.7% | |
| Other (as described) | BANK FEES | $400 | - | $400 | - | 1.4% |
| Fees: other services | $216 | $216 | - | - | 0.8% | |
| Total | $28,427 | 100% |
2022 · Form 990 · $36,178 spent · pay $0 · grants $0 · events $0
| Line | As described | Total | Program | Management | Fundraising | Share |
|---|---|---|---|---|---|---|
| Other (as described) | CONFERENCE FEES | $21,467 | $21,467 | - | - | 59.3% |
| Other (as described) | TRAVEL | $10,136 | $10,136 | - | - | 28.0% |
| Other (as described) | BUSINESS MEETINGS | $2,173 | $2,173 | - | - | 6.0% |
| Fees: accounting | $856 | $856 | - | - | 2.4% | |
| Other (as described) | GIFTS | $768 | $768 | - | - | 2.1% |
| All other expenses | $555 | - | $555 | - | 1.5% | |
| Fees: other services | $223 | $223 | - | - | 0.6% | |
| Total | $36,178 | 100% |
2021 · Form 990 · $3,189 spent · pay $0 · grants $0 · events $0
| Line | As described | Total | Program | Management | Fundraising | Share |
|---|---|---|---|---|---|---|
| Fees: accounting | $2,200 | $2,200 | - | - | 69.0% | |
| Fees: other services | $522 | $522 | - | - | 16.4% | |
| Other (as described) | BANK FEES | $360 | - | $360 | - | 11.3% |
| Other (as described) | FILING FEES | $75 | - | $75 | - | 2.4% |
| Other (as described) | TRAVEL | $32 | $32 | - | - | 1.0% |
| Total | $3,189 | 100% |
2020 · Form 990 · $12,015 spent · pay $0 · grants $0 · events $0
| Line | As described | Total | Program | Management | Fundraising | Share |
|---|---|---|---|---|---|---|
| Other (as described) | FELLOWSHIP EXPENSES INC | $7,300 | $7,300 | - | - | 60.8% |
| Other (as described) | OTHER CONFERENCE EXPENS | $3,691 | $3,691 | - | - | 30.7% |
| Other (as described) | BANK FEES | $475 | - | $475 | - | 4.0% |
| Fees: other services | $460 | $460 | - | - | 3.8% | |
| Other (as described) | FILING FEES | $75 | - | $75 | - | 0.6% |
| All other expenses | $14 | $14 | - | - | 0.1% | |
| Total | $12,015 | 100% |
2019 · Form 990 · $30,211 spent · pay $0 · grants $0 · events $0
| Line | As described | Total | Program | Management | Fundraising | Share |
|---|---|---|---|---|---|---|
| Other (as described) | FELLOWSHIP EXPENSES INC | $26,067 | $26,067 | - | - | 86.3% |
| Other (as described) | OTHER CONFERENCE EXPENS | $3,283 | $3,283 | - | - | 10.9% |
| Other (as described) | BANK FEES | $594 | - | $594 | - | 2.0% |
| Fees: other services | $217 | $217 | - | - | 0.7% | |
| Other (as described) | FILING FEES | $50 | - | $50 | - | 0.2% |
| Total | $30,211 | 100% |
2018 · Form 990 · $33,971 spent · pay $0 · grants $0 · events $0
| Line | As described | Total | Program | Management | Fundraising | Share |
|---|---|---|---|---|---|---|
| Other (as described) | FELLOWSHIP EXPENSES INC | $26,044 | $26,044 | - | - | 76.7% |
| Fees: other services | $6,200 | $6,200 | - | - | 18.3% | |
| Other (as described) | OTHER CONFERENCE EXPENS | $1,104 | $1,104 | - | - | 3.2% |
| Other (as described) | BANK FEES | $573 | $573 | - | - | 1.7% |
| Other (as described) | FILING FEES | $50 | $50 | - | - | 0.1% |
| Total | $33,971 | 100% |
2017 · Form 990 · $26,764 spent · pay $0 · grants $0 · events $0
| Line | As described | Total | Program | Management | Fundraising | Share |
|---|---|---|---|---|---|---|
| Other (as described) | FELLOWSHIP EXPENSES INC | $14,110 | - | $14,110 | - | 52.7% |
| Fees: other services | $10,600 | - | $10,600 | - | 39.6% | |
| Other (as described) | BOARD MEETING EXPENSES | $1,205 | - | $1,205 | - | 4.5% |
| Other (as described) | BANK FEES | $450 | - | $450 | - | 1.7% |
| Other (as described) | GIFTS | $227 | - | $227 | - | 0.8% |
| All other expenses | $172 | - | $172 | - | 0.6% | |
| Total | $26,764 | 100% |
2016 · Form 990 · $27,962 spent · pay $0 · grants $0 · events $0
| Line | As described | Total | Program | Management | Fundraising | Share |
|---|---|---|---|---|---|---|
| Other (as described) | FELLOWSHIP EXPENSES | $25,727 | - | $25,727 | - | 92.0% |
| Fees: accounting | $1,010 | - | $1,010 | - | 3.6% | |
| Other (as described) | BOARD MEETING EXPENSES | $817 | - | $817 | - | 2.9% |
| Other (as described) | BANK FEES | $225 | - | $225 | - | 0.8% |
| Other (as described) | WEBSITE EXPENSES | $183 | - | $183 | - | 0.7% |
| Total | $27,962 | 100% |
2015 · Form 990 · $6,917 spent · pay $0 · grants $0 · events $0
| Line | As described | Total | Program | Management | Fundraising | Share |
|---|---|---|---|---|---|---|
| Fees: other services | $6,212 | - | $6,212 | - | 89.8% | |
| Other (as described) | MISCELLANEOUS | $540 | - | $540 | - | 7.8% |
| Other (as described) | BANK FEES | $165 | - | $165 | - | 2.4% |
| Total | $6,917 | 100% |
2014 · Form 990 · $11,966 spent · pay $0 · grants $0 · events $0
| Line | As described | Total | Program | Management | Fundraising | Share |
|---|---|---|---|---|---|---|
| Other (as described) | FELLOWSHIP EXPENSE | $6,161 | - | $6,161 | - | 51.5% |
| Fees: other services | $4,858 | - | $4,858 | - | 40.6% | |
| Other (as described) | WEB DESIGN | $734 | - | $734 | - | 6.1% |
| Other (as described) | BANK FEES | $213 | - | $213 | - | 1.8% |
| Total | $11,966 | 100% |