California · Nonprofit
INT'L SOC OF ARTHROSCOPY KNEE SURGERY AND ORTHOPAEDIC SPORTS MEDICINE
INT'L SOC OF ARTHROSCOPY KNEE SURGERY AND ORTHOPAEDIC SPORTS MEDICINE (California) receives grants from 1 organization whose IRS filings report $280,000 to it, the largest being FIDELITY INVESTMENTS CHARITABLE GIFT FUND ($280,000). 1 of them have funded it in more than one year, and 100% of the money arrives through donor-advised or pass-through sponsors rather than from an institution directly.
- Revenue FY2024
- $2.2M
- Funders on record
- 1
- Grants received
- $280k
- Net assets
- $11M
What Int'L Soc of Arthroscopy Knee Surgery and Orthopaedic Sports Medicine does
Mission
A nonprofit corporation whose purpose is to advance the worldwide exchange and dissemination of education, research and patient care in arthroscopy, knee surgery and orthopaedic sports medicine.
As stated on its FY2024 Form 990.
Programs
Ikaf: ikaf 2024, the isakos knee arthroplasty forum held in kyoto, japan from october 31 to november 1, brought together 300+ surgeons, specialists, and global leaders to focus on the latest advancements in knee arthroplasty. This dedicated educational event created a unique environment for attendees to exchange ideas, learn new techniques, and discuss challenges and innovations in the field. Over two contentpacked days, participants engaged in expert lectures, interactive panel discussions, case-based presentations, and debates oncontroversies such as whether equal medial-lateral balance is still the goal in 2024. Hands-on video demonstrations, small-group "meet the expert" sessions, and discussions provided a practical focus on challenging cases. Cutting-edge topics including robotic-assistedsystems, artificial intelligence, and evolving implant technologies were also highlighted. With its global faculty, interactive formats, and targeted scope, ikaf 2024 delivered a high-impact program that advanced knowledge and fostered connections among early-career surgeons and established experts alike.
$1,037,131 spent$443,732 earned by the program50% of program spendingEducation & research: in 2024, isakos educational and research programs delivered worldclassopportunities for surgeons to advance their knowledge and skills while fostering high-quality international research. Programs featured a wide range of educational formatsfrom stimulating surgical demonstrations and small-group "meet the expert" sessionsto case-based presentations, debates on current controversies, and interactive lectures and iclsdesigned to engage and inspire. Thousands of surgeons worldwide participated in courses that included hands-on surgical skills training, virtual sessions, and inperson meetings led by renowned isakos physician leaders. The monthly isakos webinar series, curated by isakos clinical committees and led by international experts, drew live participation from more than 4,000 professionals across a broad spectrum of topics. To further advance scientific discovery, isakos awarded $180,000 in research grants, supporting high-quality projects in knee surgery, sports medicine, and arthroscopy. These competitive grants encompassed funding for new researchers and for those working in resourcelimited countries, ensuring broad and meaningful impact. Complementing…
$443,443 spentof which $31,990 as grants$883,044 earned by the program21% of program spendingJisakos/publishing: the journal of isakos (jisakos), an open-access, peer-reviewed publication, provided orthopaedic surgeons worldwide with the latest research and evidence-based guidelines in sports medicine, traumatology, and joint disorders. In 2024, more than 250 articles were published, making jisakos a crucial resource for clinicians. To expand global participation, isakos launched the jisakos "excellence in authorship" program, which offers mentorship, methodology support, fee waivers, and webinars for researchers in low- and middle-incomecountries, with up to $30,000 invested biennally. In addition, isakos published books and newsletters, bringing its library to more than 40 titles, with nearly 5,000 newsletter views in 2024. These efforts advance global research, education, and patient care.
$595,611 spent29% of program spending
The 3 programs described on its FY2024 Form 990, listed largest first by expense. Program spending in total: $2,076,185.
The organization over time
Each line starts at 100 in 2017, so what you read is the shape rather than the size: 150 means half as much again as 2017, 50 means half. The number beside each label in the key is where it ended. The shaded band is where the middle 50% of its peers' revenue would sit, given their growth.
Balance sheet
Total assets and total liabilities at each year end, in dollars. The largest one-year move in total assets was 2021 to 2022, from $14M to $12M (−18%).
How it's funded, over time
Each bar is one year's revenue split into where it came from, and every bar is the same height — these are shares, not amounts, so a year that raised twice as much looks the same size. Hover a bar for the split.
Government-grant reliance: 2021 19%. Grants only. Government contracts and fees sit inside program revenue.
10% of INT'L SOC OF ARTHROSCOPY KNEE SURGERY AND ORTHOPAEDIC SPORTS MEDICINE’s revenue is contributions — about as donation-reliant as the typical peer (51% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 5 of the last 8 reported years ran a deficit.
reserve
Leadership and staff
The officers, directors, trustees and key employees listed on each return. Joined and no longer listed compare each filing with the year before, matching people by surname and first initial; a year after a gap, or a roster under three people, has no comparison.
Chief executive
Sue J Reimbold
CEO-executive director
As listed on its FY2024 Form 990.
The chief executive listed changed between the FY2018 and FY2019 filings.
Who funds it, year by year
2018 → 2023: the base held at 1 funder, grant income rose $10k → $65k.
1 of 1 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 100% of grant dollars received. That money is really individual donors directing a sponsor; the institutions to cultivate are the non-DAF funders.
From the IRS filings of INT'L SOC OF ARTHROSCOPY KNEE SURGERY AND ORTHOPAEDIC SPORTS MEDICINE’s funders (the co-funder graph). Association, not causation. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
Where its funders are
100% of INT'L SOC OF ARTHROSCOPY KNEE SURGERY AND ORTHOPAEDIC SPORTS MEDICINE's grant income arrives through donor-advised or pass-through sponsors, whose addresses record where the money is held rather than where the donor is. Too little is directly attributable to place on a map.
Funder states come from each funder’s own filing. $280k arriving through sponsors registered in 1 state is excluded from the map and the split above: a sponsor holds money on a donor’s behalf, so its registered address would place those dollars somewhere no donor need ever have been. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
Against its field
INT'L SOC OF ARTHROSCOPY KNEE SURGERY AND ORTHOPAEDIC SPORTS MEDICINE is better cushioned than half of the 8,121 health nonprofits its size.
this organization peer median middle 50% of peers· 8,121 health nonprofits $1M–$10M, FY2024
Organizations like INT'L SOC OF ARTHROSCOPY KNEE SURGERY AND ORTHOPAEDIC SPORTS MEDICINE
Organizations whose mission and program text most resemble this one, by semantic similarity over every organization in the US filings — the closest peers, and often the clearest route to shared or prospective funders.
In California
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Where the money goes
75% of spending goes to programs.
Governance
Public support
75%
Share of support from the public (Schedule A) — the basis for its public-charity status.
Footprint & structure
Files a return copy in 1 state
Screen this organization
A dated, signed PDF of the compliance screen for INT'L SOC OF ARTHROSCOPY KNEE SURGERY AND ORTHOPAEDIC SPORTS MEDICINE: IRS status (Business Master File, Publication 78, auto-revocation), the OFAC sanctions lists, the Internal Revenue Bulletin, and California registration, with the Rev. Proc. 2018-32 §8.01 reliance elements stated element by element. Generated from the current files at the moment you download it.
Screens are triage, not determinations; a source that cannot be read reports not screened, never clear. Screen this nonprofit · How the screen works · on the API as GET /api/screening/{ein}?format=pdf
Questions and answers
- Who funds INT'L SOC OF ARTHROSCOPY KNEE SURGERY AND ORTHOPAEDIC SPORTS MEDICINE?
- INT'L SOC OF ARTHROSCOPY KNEE SURGERY AND ORTHOPAEDIC SPORTS MEDICINE (California) receives grants from 1 organization whose IRS filings report $280,000 to it, the largest being FIDELITY INVESTMENTS CHARITABLE GIFT FUND ($280,000). 1 of them have funded it in more than one year, and 100% of the money arrives through donor-advised or pass-through sponsors rather than from an institution directly.
- How many funders does INT'L SOC OF ARTHROSCOPY KNEE SURGERY AND ORTHOPAEDIC SPORTS MEDICINE have?
- IRS filings report 1 organization giving $280,000 in grants to INT'L SOC OF ARTHROSCOPY KNEE SURGERY AND ORTHOPAEDIC SPORTS MEDICINE, 1 of which have funded it in more than one year.
- Who is the largest funder of INT'L SOC OF ARTHROSCOPY KNEE SURGERY AND ORTHOPAEDIC SPORTS MEDICINE?
- FIDELITY INVESTMENTS CHARITABLE GIFT FUND is the largest funder on record, with $280,000 in grants. The full list of funders is on this page.
- How can an organization like INT'L SOC OF ARTHROSCOPY KNEE SURGERY AND ORTHOPAEDIC SPORTS MEDICINE find more funders?
- Start with the funders already giving here, then look at the foundations that back similar organizations in California. The funding by cause and by state pages list the largest funders for a given area and how to approach them.
These figures are read directly from IRS Form 990 / 990-PF e-file XML: this organization’s own return for FY2024 (financials across 2017–2024), and the filings of 1 funders that report grants to it. “On record” means captured in the filings we have parsed — a funder that does not e-file, or whose grant detail is not itemized, will not appear. Filings run roughly 12–24 months behind. Trends on this page end at FY2023, the last fiscal year that has finished arriving; later years are shown and marked, and move no figure. Data on this page was exported October 14, 2026. What this page cannot tell you · view filing