Mark Twain Medical Center Foundation
The purpose of Mark Twain Foundation is to develop resources, funding, and community support for the benefit of the Mark Twain Medical Center; to engage in and conduct charitable activities; and to promote or carry on such activities as may be deemed advisable for the betterment of the general health of the community served.
Key facts about Mark Twain Medical Center Foundation
In short: Mark Twain Medical Center Foundation gave $2.4M across 1 grant in 2025 (avg $2.4M), mostly in California. Source: 2025 IRS Form 990.
- EIN
- 68-0023507
- Latest 990 filing
- Form 990, 2025
- Annual giving (2025)
- $2,368,596
- Grants made (2025)
- 1
- Average grant
- $2,368,596
- Median grant
- $2,368,596
- Total assets
- $7,679,386
- Primary geography
- California (100% of itemized 2025 grant dollars)
Data from IRS Form 990, 2025; updated September 2026.
Financial Overview
From 2025 IRS Form 990 · View filing
Total Assets
$7.7M
-19.4% YoY
Annual Giving
$2.4M
+321.7% YoY
Grant Count
1
+0.0% YoY
Avg Grant Size
$2.4M
+321.7% YoY
How Mark Twain Medical Center Foundation gives
- Giving grew 196% from 2022 to 2025. Method
From the foundation's IRS Form 990 filings. Methodology.
About Mark Twain Medical Center Foundation
Based on IRS filings
Mark Twain Medical Center Foundation is a public charity focused on Health, based in San Andreas, CA. IRS filing data is available from 2019 through 2025. As of 2025, the organization holds $7.7M in total assets. In 2025, it awarded 1 grant totaling $2.4M. Net investment income was $433K.
Focus Areas
Ready to take the next step with Mark Twain Medical Center Foundation?
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of the 2025 grant dollars on its one itemized grant.
States
Cities
Giving Over Time
Total grant dollars and number of grants per year
From 2019 to 2025, annual grant giving ranged from $562K (2024) to $2.4M (2025). In 2025 it made 1 grant totaling $2.4M.
Grant Insights
How this funder distributes its grants
Top Recipients
Top recipient in 2025
The largest 2025 recipient was Mark Twain Medical Center ($2.4M).
Grant Size Distribution
5 grants across all recorded years
The most common grant size was in the $500K–1M range: 3 grants of 5 (60%).
Giving History
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Mark Twain Medical Center San Andreas, CA | Capital Campaigns & General Support | $2,368,596 |
Financial History
Multi-year comparison from IRS filings
| Metric | 2025 | 2024 | 2023 |
|---|---|---|---|
| Total Assets | $7,679,386 | $9,527,639 | $8,487,718 |
| Revenue | $1,301,972 | $1,092,181 | $667,156 |
| Expenses | $2,433,036 | $611,314 | $894,780 |
| Net Investment Income | $432,719 | $320,086 | $134,493 |
Data update history
When this profile's IRS filing data changed on Grantable
- Updated Form 990 for fiscal year 2020 (received by the IRS May 13, 2021)
- Updated Form 990 for fiscal year 2021 (received by the IRS May 9, 2022)
- Updated Form 990 for fiscal year 2022 (received by the IRS May 19, 2023)
- Updated Form 990 for fiscal year 2023 (received by the IRS June 11, 2024)
- Updated Form 990 for fiscal year 2024 (received by the IRS May 5, 2025)
- Added Form 990 for fiscal year 2019 (received by the IRS May 22, 2020)
- Added Form 990 for fiscal year 2025 (received by the IRS May 12, 2026)
- IRS filings on file for fiscal years 2020–2024
Leadership & Key People
Officers and directors from IRS filings
Mark Twain Medical Center Foundation is led by William Griffin MD, Chair on every filing since 2022; none of the 12 officers listed in 2025 report compensation.
Officers on the 2025 filing
William Griffin MD
Chair
On filings since 2022
2 hrs/week
No compensation reported
Greg Jordan
Director
President & Vpdev → Director, 2022
On filings since 2019
2 hrs/week
No compensation reported
Larry Cornish
Director Pt Yr
President & Vpdev → Past Chair, 2022
Past Chair → Director Pt Yr, 2025
On filings since 2019
2 hrs/week
No compensation reported
Brian Mannix
Director
On filings since 2020
2 hrs/week
No compensation reported
Dan Lewis
Director Pt Yr
Director → Director Pt Yr, 2025
On filings since 2020
2 hrs/week
No compensation reported
Randy Johnson
Director
On filings since 2022
2 hrs/week
No compensation reported
Rick Randolph
Director
On filings since 2022
2 hrs/week
No compensation reported
John Polimeno
Director Pt Yr
Director → Director Pt Yr, 2025
On filings since 2024
2 hrs/week
No compensation reported
Zach Glanville
Director
On filings since 2024
2 hrs/week
No compensation reported
Peggy Harrington Lucas
Vice Chair
Director → Vice Chair, 2022
On filings since 2019
2 hrs/week
No compensation reported
Darrie Gillespie
Secretary
Director → Secretary, 2022
On filings since 2020
2 hrs/week
No compensation reported
Charanjit Singh
Cpo
Chf Philanthrop → Cpo, 2022
On filings since 2021
20 hrs/week
No compensation reported
Former officers (8)
- Former: Julie Eckardt (2019–2022) — Cpo Pt Yr
- Former: Andrea Sullivan (2019–2021) — Secretary & Treasurer
- Former: John Maurer (2019–2021) — Director
- Former: Ken McInturf (2019–2021) — Director
- Former: Ruth Huffman (2019–2021) — Director
- Former: Brad Ostrov (2019) — Director
- Former: Janet Cuslidge (2019) — Director
- Former: Sal LoFranco (2019) — Director
Data from IRS Form 990 filings, 2019–2025. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.
Frequently asked questions about Mark Twain Medical Center Foundation
How much does Mark Twain Medical Center Foundation give each year?
Mark Twain Medical Center Foundation gave $2.4M across 1 grant in 2025, according to its 2025 IRS Form 990. In 2024 it gave $562K across 1 grant.
How large is Mark Twain Medical Center Foundation?
Mark Twain Medical Center Foundation reported $7.7M in total assets on its 2025 IRS Form 990. Its revenue that year was $1.3M.
What is Mark Twain Medical Center Foundation?
Mark Twain Medical Center Foundation is a public charity focused on Health, based in San Andreas, CA. It holds $7.7M in total assets as of 2025.
Where does Mark Twain Medical Center Foundation operate?
Mark Twain Medical Center Foundation has awarded grants in California.
What is Mark Twain Medical Center Foundation's EIN?
Mark Twain Medical Center Foundation's EIN (Employer Identification Number) is 68-0023507. IRS Form 990 filing data is available on this page for 2019–2025.
Data last updated September 2026. Sourced from IRS Form 990 filings.
Here's the math on researching Mark Twain Medical Center Foundation by hand.
Explore Open Grants
Browse active grant opportunities in Mark Twain Medical Center Foundation's focus areas in our free grants database
Similar Funders
Similar funders in California
Silicon Valley Community Foundation
Mountain View, CA
Silicon Valley Community Foundation funds work in areas such as housing, economic security, education, health, the environment, arts and culture, and civic engagement, with Community Action Grants supporting local, community-led organizations in San Mateo and Santa Clara counties. Its 2024 grants had a median of $51,716, though amounts varied widely; applications depend on the program, and SVCF states that it does not accept unsolicited proposals for advised funds.
Assets
$12.3B
Grants
3,576
Total Given
$3.2B
California Community Foundation
Los Angeles, CA
The California Community Foundation supports nonprofits through discretionary and donor-directed grants, with discretionary priorities including education, health, housing and immigration, alongside other areas such as arts, civic engagement and economic opportunity. Its 2025 grants had a median of $50,000, and its work is focused on Los Angeles County; prospective discretionary applicants are asked to contact the relevant program officer before submitting a letter of intent.
Assets
$2.3B
Grants
2,174
Total Given
$326.6M
The William & Flora Hewlett Foundation
Menlo Park, CA
The William & Flora Hewlett Foundation funds education, climate and conservation, the arts, democracy, gender equity, racial justice, and efforts to strengthen nonprofits and philanthropy, with work spanning the San Francisco Bay Area, the U.S. West, and locations including East and West Africa and Mexico. Its 2024 grants had a median award of $150,000, though amounts varied widely. It generally does not accept unsolicited requests, but sometimes invites proposals through open processes.
Assets
$14.2B
Grants
2,001
Total Given
$625.0M
Marin Community Foundation
Novato, CA
Marin Community Foundation funds work in affordable housing and homelessness, community resilience and power, as well as social services, education, arts and conservation, with a focus on marginalized Marin County residents and some broader U.S. and international grantmaking. Its 2025 grants had a median of $25,000, though amounts varied widely. The profile does not state whether it accepts unsolicited requests.
Assets
$1.3B
Grants
1,573
Total Given
$186.1M
Conrad N Hilton Foundation
Westlake Village, CA
The Conrad N. Hilton Foundation funds nonprofits working to improve lives and alleviate poverty, with initiatives including early childhood development, homelessness, refugees, safe water, and support for foster and opportunity youth. Its work is global, and its 2024 grants had a median award of $76,000. It generally does not accept unsolicited requests, except through its Good Neighbor Program for eligible local nonprofits and Title 1 schools.
Assets
$7.4B
Grants
1,339
Total Given
$287.7M
The California Endowment
Los Angeles, CA
The California Endowment funds nonprofit, government, and eligible faith-based organizations working to advance health and racial equity, strengthen community power, and improve health systems and communities, primarily in California. Its 2024 median grant was $100,000, and funding is by invitation only; it does not accept unsolicited requests.
Assets
$4.5B
Grants
1,125
Total Given
$215.9M
Kaiser Foundation Hospitals
Oakland, CA
Kaiser Foundation Hospitals funds health care access and services, community health, health education, and related work, with priorities including mental and behavioral health, housing, and income and employment. Its 2024 grants had a median of $25,000, though amounts varied widely; most grant dollars went to California, with some going elsewhere. In Southern California, it says it does not accept unsolicited letters of inquiry or proposals and awards grants through competitive processes to pre-identified organizations.
Assets
$87.4B
Grants
1,122
Total Given
$225.4M
Direct Relief
Santa Barbara, CA
Direct Relief supports healthcare providers serving people affected by poverty or emergencies, including community health centers, clinics, and grassroots organizations, with medicines, supplies, and funding for health access and equity. In 2025, its grants had a median award of about $65,000, and its work spans all 50 U.S. states and countries around the world; the profile does not state whether it accepts unsolicited requests.
Assets
$1.3B
Grants
1,367
Total Given
$337.4M
The San Diego Foundation
San Diego, CA
The San Diego Foundation funds nonprofit work in family well-being, education, the environment, and housing, including projects, capacity building, and general support that advance equity and resilient communities. Its 2025 grants had a median of $25,000, though amounts varied widely; applicants generally must be located in San Diego County and primarily serve county residents. It offers competitive grant opportunities through its online portal, but the profile does not state whether it accepts unsolicited requests.
Assets
$1.7B
Grants
1,158
Total Given
$94.3M
Jewish Community Foundation of Los Angeles
Los Angeles, CA
The Jewish Community Foundation of Los Angeles supports human services, health, education, Jewish life, arts and culture, Israel-related work, and nonprofit capacity and capital projects, with a focus on Los Angeles and also giving in Israel and beyond. Its 2024 itemized grants had a median of $25,000, though amounts varied widely. General Community grants are by invitation only and do not accept unsolicited applications; current procedures should be verified.
Assets
$1.2B
Grants
1,063
Total Given
$142.2M
Jewish Community Federation of San Francisco the Peninsula Marin & Sonoma
San Francisco, CA
The Federation funds Jewish life and identity, antisemitism response, crisis relief, human services, and justice and inclusion, with work in the Bay Area, Israel, and beyond. Its 2025 grants ranged from $5,050 to $2,405,915, with a median of $22,750. It frequently issues requests for proposals and welcomes inquiries about new Bay Area programs; no current organization grant opportunities were listed.
Assets
$2.0B
Grants
1,032
Total Given
$94.5M
The David and Lucile Packard Foundation
Los Altos, CA
The David and Lucile Packard Foundation funds charitable organizations working on just societies, healthy families and communities, and a healthy natural world, including climate solutions, ocean conservation, and science. Its 2024 grants had a median of $150,000, and half of grant dollars went to California recipients. It accepts unsolicited requests, but less than 1% of its grants come from them.
Assets
$8.5B
Grants
1,029
Total Given
$350.0M
More Funders in California
Mark Twain Medical Center Foundation down — hundreds of funders to go?