Nonprofit · EIN 26-4160971
DIAGNOSTIC MICROBIOLOGY DEVELOPMENT PROGRAM
Also known as DMDP
Tax-exempt · BERKELEY, CA 94703
Address and contacts
- Address (IRS master file)
- 1825 WOOLSEY ST, BERKELEY, CA 94703-2426
- In care of
- % ELLEN JO BARON
- Mailing address (990-N for 2025)
- 1825 Woolsey St, Berkeley CA 94703
- Principal officer (990-N for 2025)
- John Ridderhof, 7 Court View Lane, Asheville NC 28806
What it must file and when
IRS records say it files Form 990-N (e-Postcard). Gross receipts normally $50,000 or less. 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-N on file |
| 2024 | December 31, 2024 | May 15, 2025 | No data |
| 2023 | December 31, 2023 | May 15, 2024 | 990-EZ on file |
IRS record
- EIN
- 26-4160971
- 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
- 2010
- Accounting year ends
- December
- Files
- Form 990-N (e-Postcard)
- Category (NTEE)
- International, foreign affairs and national security (Q33)
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990-N for 2025 Officer: John Ridderhof | December 31, 2025 | ≤ $50,000 receipts | – | – | e-Postcard |
| 990-EZ | December 2023 | $0 | $269,086 | $336,707 | IRS |
| 990 | December 2022 | $0 | $1,187,231 | $608,696 | IRS |
| 990 | December 2021 | – | – | – | IRS |
| 990 | December 2020 | – | – | – | IRS |
| 990 | December 2018 | – | – | – | IRS |
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 DIAGNOSTIC MICROBIOLOGY DEVELOPMENT PROGRAM
- What is the EIN of DIAGNOSTIC MICROBIOLOGY DEVELOPMENT PROGRAM?
- The employer identification number (EIN) of DIAGNOSTIC MICROBIOLOGY DEVELOPMENT PROGRAM is 26-4160971.
- Is DIAGNOSTIC MICROBIOLOGY DEVELOPMENT PROGRAM tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2010.
- Are donations to DIAGNOSTIC MICROBIOLOGY DEVELOPMENT PROGRAM tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does DIAGNOSTIC MICROBIOLOGY DEVELOPMENT PROGRAM file?
- Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
- When is the next return of DIAGNOSTIC MICROBIOLOGY DEVELOPMENT PROGRAM 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 DIAGNOSTIC MICROBIOLOGY DEVELOPMENT PROGRAM last file with the IRS?
- The latest return in the IRS public files is the 990-N for 2025 for the year ended December 31, 2025.
- Who is the principal officer of DIAGNOSTIC MICROBIOLOGY DEVELOPMENT PROGRAM?
- The 990-N for 2025 names John Ridderhof.
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