Nonprofit · EIN 20-0173930
SENTINEL NODE ONCOLOGY FOUNDATION
Tax-exempt · NOVATO, CA 94949
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990 | $72,809 | $14,443 | $58,366 | $243,118 | $49 | $243,069 |
| December 31, 2024 | 990-EZ | $20,366 | $48,110 | -$27,744 | $196,494 | $11,791 | $184,703 |
| December 31, 2023 | 990-EZ | $51,026 | $90,320 | -$39,294 | $218,610 | $500 | $218,110 |
Financial details: 990 for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $0
- Program service revenue
- $11,614
- Investment income
- $58,182
- Net gain from sales of assets
- $58,135
- Other revenue
- $3,013
Expenses
- Grants and similar amounts paid
- $1,500
- Compensation of officers, directors and key employees
- $0
- Salaries, compensation and benefits (total)
- $0
- Professional fundraising fees
- $0
- Legal fees
- $672
- Accounting fees
- $1,816
- Program services (functional)
- $5,257
- Management and general (functional)
- $4,867
- Fundraising (functional)
- $4,319
Balance sheet and other
- Total assets, start of year
- $196,494
- Total assets, end of year
- $243,118
- Total liabilities, end of year
- $49
- Net assets, end of year
- $243,069
- Net assets without donor restrictions
- $243,069
- Gross receipts
- $214,017
- Employees
- 0
- Year formed
- 2003
- 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 |
|---|---|---|---|
| Stanley P Leong | President & CEO Trustee or director | 0 | $0 |
| Shawn Young | Director Trustee or director | 0 | $0 |
| PJ Ramtin | Director Trustee or director | 0 | $0 |
| Richard Kho | Director Trustee or director | 0 | $0 |
| Lyall Fahden | Director Trustee or director | 0 | $0 |
| Richard Hong | Director Trustee or director | 0 | $0 |
| Larry Levy | Director Trustee or director | 0 | $0 |
| Melissa Sitter | Director Trustee or director | 0 | $0 |
| Diane Tillman | Director Trustee or director | 0 | $0 |
990-EZ for the year ended December 31, 2024: 9 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Stanley P Leong | President & CEO | 0 | $0 |
| Shawn Young | Director | 0 | $0 |
| PJ Ramtin | Director | 0 | $0 |
| Richard Kho | Director | 0 | $0 |
| Lyall Fahden | Director | 0 | $0 |
| Richard Hong | Director | 0 | $0 |
| Larry Levy | Director | 0 | $0 |
| Melissa Sitter | Director | 0 | $0 |
| Diane Tillman | Director | 0 | $0 |
990-EZ for the year ended December 31, 2023: 10 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Stanley P Leong | President & CEO | 0 | $0 |
| Barbara A Pockaj | Secretary | 0 | $0 |
| Jonathan S Zager | Vice President | 0 | $0 |
| Richard White | Director | 0 | $0 |
| Lyall Fahden | Director | 0 | $0 |
| Richard Hong | Director | 0 | $0 |
| Larry Levy | Director | 0 | $0 |
| Eric Mogensen | Director | 0 | $0 |
| Melissa Sitter | Director | 0 | $0 |
| Diane Tillman | Director | 0 | $0 |
Address and contacts
- Address (IRS master file)
- 62 RICHARDSON RD, NOVATO, CA 94949-6170
- In care of
- % STANLEY LEONG MD
- Mailing address (990-N for 2012)
- 62 Richardson road, Novato CA 94949
- Principal officer (990 for 2025)
- Stanley P Leong, 62 Richardson Road, Novato, CA 94949
- Principal officer (990-N for 2012)
- Stanley Leong, 62 Richardson Road, Novato CA 94949
- Signed the 990
- Stanley P Leong, President
- Phone
- (415) 506-0138
- Return prepared by
- Richard K Chinlund CPA
Mission
Advance the care and treatment of patients with solid cancer, and develop new preventative strategies, diagnosis and treatments.
Program accomplishments
- In order for Sentinel Node Oncology Foundation (SNOF) to elevate to the next level in its mission, an agreement was made between Atrium Health Foundation and Sentinel Node Oncology Foundation whereby all assets would be transferred and housed in a separate fund managed by Atrium Health Levine Cancer leadership in year 2026. The fund would mirror the purpose of Sentinel Node Oncology Foundation of solely supporting a robust sentinel node databank. The fund would also manage contributions and registration fees for databank participants.Expenses $5,257
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-EZ on file |
| 2023 | December 31, 2023 | May 15, 2024 | 990-EZ on file |
IRS record
- EIN
- 20-0173930
- Tax-exempt status
- 501(c)(3): Charitable, religious, educational or scientific organization
- Foundation status
- Publicly supported organization (170(b)(1)(A)(vi))
- Donations deductible (Pub 78)
- Public charity, 50% deduction limit
- Exempt since
- 2004
- Accounting year ends
- December
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Voluntary health associations and medical disciplines (G30)
- Assets (IRS master file)
- $243,118
- Income (IRS master file)
- $214,017
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | December 2025 | – | – | – | IRS |
| 990-EZ | December 2024 | – | – | – | IRS |
| 990-EZ | December 2023 | $51,026 | $90,320 | $218,610 | IRS |
| 990-EZ | December 2022 | – | – | – | IRS |
| 990 | December 2021 | – | – | – | IRS |
| 990 | December 2020 | – | – | – | IRS |
| 990 | December 2018 | – | – | – | IRS |
| 990-N for 2012 Officer: Stanley Leong | December 31, 2012 | ≤ $50,000 receipts | – | – | e-Postcard |
990-N: the IRS publishes only the latest e-Postcard per organization; earlier years appear here as 990.tax collects the monthly files. 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.
Questions about SENTINEL NODE ONCOLOGY FOUNDATION
- What is the EIN of SENTINEL NODE ONCOLOGY FOUNDATION?
- The employer identification number (EIN) of SENTINEL NODE ONCOLOGY FOUNDATION is 20-0173930.
- Is SENTINEL NODE ONCOLOGY FOUNDATION tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2004.
- Are donations to SENTINEL NODE ONCOLOGY FOUNDATION tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does SENTINEL NODE ONCOLOGY FOUNDATION 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 SENTINEL NODE ONCOLOGY FOUNDATION 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 SENTINEL NODE ONCOLOGY FOUNDATION 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 SENTINEL NODE ONCOLOGY FOUNDATION?
- The 990 for the year ended December 31, 2025 names Stanley P Leong.
- Who are the officers and directors of SENTINEL NODE ONCOLOGY FOUNDATION?
- The 990 for the year ended December 31, 2025 lists 9 people; 0 received compensation from the organization.
- How much revenue does SENTINEL NODE ONCOLOGY FOUNDATION have?
- On its 990 for the year ended December 31, 2025 it reported revenue of $72,809, expenses of $14,443 and total assets of $243,118 at year end.
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All nonprofits in NOVATO · California · Voluntary health associations and medical disciplines