California · Nonprofit
Medical Society of Sonoma County
Medical Society of Sonoma County (California) receives grants from 2 organizations whose IRS filings report $2,090 to it, the largest being OVERSTREET FAMILY FOUNDATION ($2,000). 1 of them have funded it in more than one year.
- Revenue FY2024
- $0
- Funders on record
- 2
- Grants received
- $2k
- Net assets
- $37k
What Medical Society of Sonoma County does
Mission
Promote the science, ethical practice and art of medicine and the protection of the public health, to cooperate with organizations of like purposes and to unite with similar societies of other counties of the state tto form the California Medical Association.
As stated on its FY2024 Form 990-EZ.
Program
Not Applicable
$0 spent
The program described on its FY2024 Form 990-EZ. Program spending in total: $0.
The organization over time
Each line starts at 100 in 2020, so what you read is the shape rather than the size: 150 means half as much again as 2020, 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 2020 to 2021, from $29k to $117k (+303%).
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.
100% of Medical Society of Sonoma County’s revenue is contributions — more reliant on donations than three-quarters of its peers (100% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 4 of the last 5 reported years ran a deficit.
Who funds it, year by year
2020 → 2023: the base held at 1 funder, grant income fell $30 → $19.
1 of 2 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 4% 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 Medical Society of Sonoma County’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.
How concentrated its funding is
Medical Society of Sonoma County leans on a few funders — its largest provides 96% of grant income and the top three 100%; half comes from just 1 funder.
the vertical line marks half of all grant income — 1 funder to its left
Largest funder’s share by year: 2020 100% · 2021 99% · 2022 100% · 2023 100% — broadly stable.
“Effective funders” = inverse Herfindahl index (1 / Σ shareᵢ²) — the number of equal-sized funders that would give the same concentration. 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
Medical Society of Sonoma County draws 100% of its grant income from funders outside California, across 1 state in all.
Funder states come from each funder’s own filing. $90 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
Medical Society of Sonoma County's revenue fell 100% between 2020 and 2024.
this organization peer median middle 50% of peers· 9,898 health nonprofits under $100k, FY2024
Organizations like Medical Society of Sonoma County
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.
Public support
100%
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 Medical Society of Sonoma County: 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 Medical Society of Sonoma County?
- Medical Society of Sonoma County (California) receives grants from 2 organizations whose IRS filings report $2,090 to it, the largest being OVERSTREET FAMILY FOUNDATION ($2,000). 1 of them have funded it in more than one year.
- How many funders does Medical Society of Sonoma County have?
- IRS filings report 2 organizations giving $2,090 in grants to Medical Society of Sonoma County, 1 of which have funded it in more than one year.
- Who is the largest funder of Medical Society of Sonoma County?
- OVERSTREET FAMILY FOUNDATION is the largest funder on record, with $2,000 in grants. The full list of funders is on this page.
- How can an organization like Medical Society of Sonoma County 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.
Play a game about who funds Medical Society of Sonoma County →
These figures are read directly from IRS Form 990 / 990-PF e-file XML: this organization’s own return for FY2024 (financials across 2020–2024), and the filings of 2 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