Nonprofit · EIN 95-1684086
SANSUM DIABETES RESEARCH INSTITUTE
Tax-exempt · SANTA BARBARA, CA 93105
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990 | $6,303,337 | $7,162,681 | -$859,344 | $28,805,606 | $4,051,624 | $24,753,982 |
| December 31, 2024 | 990 | $4,393,121 | $6,970,315 | -$2,577,194 | $26,544,993 | $1,476,773 | $25,068,220 |
| December 31, 2023 | 990 (amended) | $10,639,114 | $6,651,715 | $3,987,399 | $27,583,956 | $1,423,972 | $26,159,984 |
Financial details: 990 for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $2,934,028
- Program service revenue
- $2,087,229
- Investment income
- $1,412,044
- Net gain from sales of assets
- $1,010,666
- Net income from fundraising events
- -$130,140
- Other revenue
- -$129,964
Expenses
- Grants and similar amounts paid
- $0
- Compensation of officers, directors and key employees
- $1,057,915
- Other salaries and wages
- $3,267,323
- Salaries, compensation and benefits (total)
- $5,035,363
- Professional fundraising fees
- $0
- Legal fees
- $9,434
- Accounting fees
- $27,000
- Occupancy
- $35,864
- Travel
- $24,137
- Depreciation
- $161,832
- Program services (functional)
- $5,282,012
- Management and general (functional)
- $1,034,974
- Fundraising (functional)
- $845,695
Balance sheet and other
- Total assets, start of year
- $26,544,993
- Total assets, end of year
- $28,805,606
- Total liabilities, end of year
- $4,051,624
- Net assets, end of year
- $24,753,982
- Land, buildings and equipment
- $9,386,704
- Publicly traded securities
- $11,186,692
- Net assets without donor restrictions
- $13,399,618
- Net assets with donor restrictions
- $11,354,364
- Gross receipts
- $10,156,332
- Employees
- 74
- Volunteers
- 44
- Year formed
- 1944
- State of legal domicile
- CA
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 | Other / benefits |
|---|---|---|---|---|
| Elizabeth Thompson | CEO Officer | 40 | $329,755 | $19,559 |
| Kristin Castorino DO | Research Physician | 40 | $264,433 | $26,327 |
| Kristen Nelson | Dir Clinical Rese | 40 | $256,529 | $13,638 |
| Dr Andrew Rhinehart | CEO/CMO Officer | 40 | $230,465 | $6,792 |
| Kara Hornbuckle | VP Development and Public Affairs | 40 | $168,763 | $11,821 |
| Sarintha Logan | Clinical Research | 40 | $161,001 | $17,931 |
| Trisha Purkey | Clinical Research | 40 | $156,913 | $19,143 |
| Melody Lung | Clinical Research | 40 | $136,826 | $12,150 |
| Olivia Watt | Mgr Lab/Research | 40 | $130,214 | $8,891 |
| James Sloan | President Trustee or director, Officer | 4 | $0 | $0 |
| Matthew Rowe CIMA | Vice President Trustee or director, Officer | 2 | $0 | $0 |
| Flint Ogle | Treasurer Trustee or director, Officer | 2 | $0 | $0 |
| Elena Engel | Secretary Trustee or director, Officer | 2 | $0 | $0 |
| Joan Doell Arnold | Trustee Trustee or director | 1 | $0 | $0 |
| Miguel Avila | Trustee Trustee or director | 1 | $0 | $0 |
12 more people on this return
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Daniel Berger MD | Trustee Trustee or director | 1 | $0 |
| Anthony Castillo | Trustee Trustee or director | 1 | $0 |
| Daren Dickerson | Trustee Trustee or director | 1 | $0 |
| Lindsey Duca PhD | Trustee Trustee or director | 1 | $0 |
| Lynn Fitzgibbons MD | Trustee Trustee or director | 1 | $0 |
| Yvette Giller | Trustee Trustee or director | 1 | $0 |
| Steven Jung Esq | Trustee Trustee or director | 1 | $0 |
| Norman Kurland | Trustee Trustee or director | 1 | $0 |
| Robert Nagy MD | Trustee Trustee or director | 1 | $0 |
| Michael Paskin | Trustee Trustee or director | 1 | $0 |
| Wendy Thies Sell | Trustee Trustee or director | 1 | $0 |
| Mark Wilson | Trustee Trustee or director | 1 | $0 |
990 for the year ended December 31, 2024: 27 people
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| Elizabeth Thompson | CEO Officer | 40 | $272,019 | $31,662 |
| Kristin Castorino DO | Research Physician | 40 | $269,568 | $24,492 |
| Kristen Nelson | Director Clinical Research Operatio | 40 | $210,223 | $27,631 |
| Kara Hornbuckle | VP Developemnt and Public Affairs | 40 | $166,532 | $21,220 |
| Andrew Koutnik | Research Scientist | 40 | $170,414 | $13,583 |
| Sarintha Bell | Clinical Research | 40 | $163,045 | $16,498 |
| Mei Mei Church | Clinical Research | 40 | $158,094 | $8,978 |
| Christian Farfan | Director Clinical | 40 | $144,318 | $11,206 |
| Kaitelyn Kelly | SR MGR HR | 40 | $119,586 | $13,221 |
| James Sloan | President Trustee or director, Officer | 4 | $0 | $0 |
| Flint Ogle | VP/Treasurer Trustee or director, Officer | 2 | $0 | $0 |
| Matthew G Rowe CIMA | Executive VP Trustee or director, Officer | 2 | $0 | $0 |
| Elena F Engel | Secretary Trustee or director, Officer | 2 | $0 | $0 |
| Joan Arnold | Trustee Trustee or director | 1 | $0 | $0 |
| Miguel Avila | Trustee Trustee or director | 1 | $0 | $0 |
| Daniel Berger MD | Trustee Trustee or director | 1 | $0 | $0 |
| Anthony Castillo | Trustee Trustee or director | 1 | $0 | $0 |
| Daren Dickerson | Trustee Trustee or director | 1 | $0 | $0 |
| Lindsey Duca | Trustee Trustee or director | 1 | $0 | $0 |
| Lynn Fitzgibbons MD | Trustee Trustee or director | 1 | $0 | $0 |
| Yvette Giller | Trustee Trustee or director | 1 | $0 | $0 |
| Steven Jung Esq | Trustee Trustee or director | 1 | $0 | $0 |
| Norman A Kurland | Trustee Trustee or director | 1 | $0 | $0 |
| Robert Nagy MD | Trustee Trustee or director | 1 | $0 | $0 |
| Michael J Paskin | Trustee Trustee or director | 1 | $0 | $0 |
| Wendy Thies Sell | Trustee Trustee or director | 4 | $0 | $0 |
| Mark Wilson MD | Trustee Trustee or director | 1 | $0 | $0 |
990 for the year ended December 31, 2023: 29 people
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| Kristin Castorino DO | Research Physician | 40 | $266,900 | $21,775 |
| Raul Bastarrachea | Senior Research Scientist | 40 | $196,238 | $27,891 |
| Ellen Goodstein | Executive Dir. Officer | 40 | $208,997 | $11,308 |
| Kristen Nelson | Senior Clinical Nurse Practitioner | 40 | $140,962 | $20,119 |
| Mei Mei Church | Nurse Practitioner | 40 | $136,957 | $7,759 |
| Kara Hornbuckle | Dir Development | 40 | $130,517 | $8,565 |
| Ashley Thorsell | Research Physician | 40 | $123,750 | $9,758 |
| Christian Farfan | Senior Clinical Tr | 40 | $122,417 | $6,183 |
| Andrew Koutnik | Research Scientist | 40 | $118,293 | $911 |
| Alexander DePaoli MD | Immed Past Pres Trustee or director, Officer | 2 | $15,263 | $0 |
| Kenneth Waxman MD FACS | President Trustee or director, Officer | 4 | $0 | $0 |
| James Sloan | VP/Treasurer Trustee or director, Officer | 2 | $0 | $0 |
| Joan Doell Arnold | Secretary Trustee or director, Officer | 2 | $0 | $0 |
| Miguel Avila | Trustee Trustee or director | 1 | $0 | $0 |
| Daniel Berger MD | Trustee Trustee or director | 1 | $0 | $0 |
| Anthony Castillo | Trustee Trustee or director | 1 | $0 | $0 |
| Lindsey Duca PhD | Trustee Trustee or director | 1 | $0 | $0 |
| Elena Engel | Trustee Trustee or director | 1 | $0 | $0 |
| Steven Jung Esq | Trustee Trustee or director | 1 | $0 | $0 |
| Norman Kurland | Trustee Trustee or director | 1 | $0 | $0 |
| Robert Nagy MD | Trustee Trustee or director | 1 | $0 | $0 |
| Flint Ogle | Trustee Trustee or director | 1 | $0 | $0 |
| Michael Paskin | Trustee Trustee or director | 1 | $0 | $0 |
| Miguel Rodriguez | Trustee Trustee or director | 1 | $0 | $0 |
| Matthew Rowe CIMA | Trustee Trustee or director | 1 | $0 | $0 |
| Wendy Thies Sell | Trustee Trustee or director | 1 | $0 | $0 |
| Mark Simon | Trustee Trustee or director | 4 | $0 | $0 |
| Sandra Tillisch Svoboda RN | Trustee Trustee or director | 1 | $0 | $0 |
| Brad Webb | Trustee Trustee or director | 1 | $0 | $0 |
Address and contacts
- Address (IRS master file)
- 2219 BATH ST, SANTA BARBARA, CA 93105-4321
- Principal officer (990 for 2025)
- Dr Andrew Rhinehart, 2219 BATH STREET, Santa Barbara, CA 93105
- Signed the 990
- Dr Andrew Rhinehart, CEO/CMO
- Phone
- (805) 682-7638
- Website
- WWW.Sansum.Org
- Return prepared by
- Stoltey & Associates
California records
California keeps its own records of charities and corporations. Search them by EIN 95-1684086 or by the name SANSUM DIABETES RESEARCH INSTITUTE.
- Attorney General, Registry of Charities and Fundraisers
- Registration status and filed reports (CT-TR-1, RRF-1)
- Secretary of State, bizfile Online
- Corporation status, entity number, agent for service
- Franchise Tax Board
- Entity status letter (state tax exemption, good standing)
Mission
Dedicated to improving the lives of people impacted by diabetes through research, education and care.
Program accomplishments
- ResearchClinical Research Type 1 DiabetesSansum Diabetes Research Institute (SDRI) is a nonprofit organization dedicated to improving the lives of people impacted by diabetes through clinical research, education, and specialized patient care. During 2025, SDRI initiated 13 clinical research trials involving 197 individual participants. These studies evaluated new technologies, medications, and treatment approaches intended to improve diabetes management and health outcomes.Research activities included automated insulin delivery systems, continuous glucose monitoring, inhaled insulin therapies, GLP-1 medications, ketone and lactate monitoring, digital health tools, and other emerging diabetes technologies. SDRI collaborated with leading diabetes technology and pharmaceutical companies to conduct research that supports the development of safer and more effective treatments for people living with diabetes.During 2025, SDRI also launched Screen & Support, a community-based type 1 diabetes early detection program. Through autoantibody screening, education, monitoring, and follow-up care, the program identifies children and adults at increased risk for developing type 1 diabetes before symptoms occur. Earlier identification helps reduce the likelihood of diagnosis during diabetic ketoacidosis (DKA), provides families with education and support, and expands access to therapies that may delay progression to insulin-dependent disease. SDRI also continued leading the California Type 1 Diabetes Screening Collaborative to expand early detection efforts throughout California.Clinical Research Type 2 DiabetesSDRI continued research designed to improve treatment options and clinical outcomes for individuals living with type 2 diabetes. During 2025, the SDRI participated in studies evaluating automated insulin delivery systems, continuous glucose monitoring technologies, and emerging therapeutic approaches intended to improve glycemic control while reducing the burden of diabetes management.Research findings contributed to the growing body of evidence supporting advanced diabetes technologies for adults with type 2 diabetes and included participation from diverse populations to improve the applicability of study findings across communities.Expenses $4,634,525 · revenue $1,969,111
- Education and Community OutreachCommunity education is an essential component of SDRI's charitable mission. SDRI provides evidence-based education, peer support, and culturally responsive programs that improve diabetes prevention and self-management.During 2025, SDRI continued Ocho Pasos a la Buena Salud, a Spanish-language diabetes prevention and self-management program led by trained Community Health Workers (Promotoras). The program provides culturally appropriate education on nutrition, physical activity, and diabetes self-management while addressing barriers to healthcare access.SDRI also expanded education and support through One Talk, LADA Talk, diabetes technology training, bilingual support groups, community outreach events, and Back-to-School educational programming. These programs improve diabetes knowledge, increase self-management skills, reduce diabetes-related distress, and strengthen community support for individuals and families affected by diabetes.Expenses $367,818 · revenue $68,073
- Clinical CareSDRI provides specialized outpatient clinical care in diabetes in pregnancy, pediatric diabetes, and adult endocrinology.During 2025, SDRI expanded its Diabetes in Pregnancy Program to preserve access to specialized care following changes in local maternal health services. SDRI assumed responsibility for caring for approximately 100 additional patients, with particular emphasis on serving under-resourced and underrepresented Latina women throughout Santa Barbara County.Clinical services include individualized diabetes management, nutrition counseling, continuous glucose monitoring support, medication management, diabetes education, and coordinated care with obstetric and maternal-fetal medicine providers. SDRI also provides culturally responsive and bilingual services to improve maternal and infant health outcomes.SDRI's pediatric diabetes program provides comprehensive education, technology training, behavioral support, and ongoing clinical care that helps children, adolescents, and families safely manage diabetes and successfully transition to lifelong self-management.Expenses $279,669 · revenue $50,045
- Research InfrastructureDuring 2025, SDRI completed renovation of its 18,000-square-foot research, clinical care, and education center. The renovated facility increased organizational capacity by providing dedicated research suites, expanded clinical space, industry collaboration areas, a teaching kitchen, a DEXA research suite, and community education facilities. These improvements enhance SDRI's ability to conduct clinical research, provide specialized patient care, and deliver diabetes education programs that benefit the community.Summary of Public BenefitThrough its integrated programs in clinical research, specialized clinical care, early detection, education, and community outreach, SDRI advances the early detection, treatment, and management of diabetes while improving access to evidence-based care for children, adults, pregnant individuals, and underserved populations. These activities further SDRIs charitable mission by improving health outcomes, expanding access to specialized services, and advancing diabetes science for the benefit of the public.
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
- 95-1684086
- 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
- 2020
- Accounting year ends
- December
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Medical research (H05)
- Assets (IRS master file)
- $28,805,606
- Income (IRS master file)
- $10,156,332
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | December 2025 | $6,303,337 | $7,162,681 | $28,805,606 | XML |
| 990 | December 2024 | $4,393,121 | $6,970,315 | $26,544,993 | XML |
| 990 | December 2023 | $10,639,114 | $6,651,715 | $27,583,956 | XML |
| 990 | December 2022 | $8,154,412 | $5,669,158 | $22,174,581 | 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 95-1684086).
Questions about SANSUM DIABETES RESEARCH INSTITUTE
- What is the EIN of SANSUM DIABETES RESEARCH INSTITUTE?
- The employer identification number (EIN) of SANSUM DIABETES RESEARCH INSTITUTE is 95-1684086.
- Is SANSUM DIABETES RESEARCH INSTITUTE tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2020.
- Are donations to SANSUM DIABETES RESEARCH INSTITUTE tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does SANSUM DIABETES RESEARCH INSTITUTE 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 SANSUM DIABETES RESEARCH INSTITUTE 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 SANSUM DIABETES RESEARCH INSTITUTE 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 SANSUM DIABETES RESEARCH INSTITUTE?
- The 990 for the year ended December 31, 2025 names Dr Andrew Rhinehart.
- Who are the officers and directors of SANSUM DIABETES RESEARCH INSTITUTE?
- The 990 for the year ended December 31, 2025 lists 27 people; 9 received compensation from the organization, the highest $329,755 (Elizabeth Thompson, CEO).
- How much revenue does SANSUM DIABETES RESEARCH INSTITUTE have?
- On its 990 for the year ended December 31, 2025 it reported revenue of $6,303,337, expenses of $7,162,681 and total assets of $28,805,606 at year end.
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