Data from the NPPES registry. May not reflect recent changes — verify at nppes.cms.hhs.gov.
JOHN TROJANOWSKI, PSYD
Active Sole ProprietorJOHN TROJANOWSKI, PSYD is a Clinical Psychologist healthcare provider located in BERKELEY, California. NPI 1073804910 is currently active in the NPPES registry. Verify at CMS.
Clinical Psychologist · BERKELEY, CA
Registration Details
- NPI Number
- 1073804910
- Provider Type
- Individual
- Gender
- Male
- NPI Issued
- Apr 26, 2011 (15.116994260676 yrs)
- Last Updated
- Feb 20, 2026
- License
-
PSY31863 (CA)
- Sole Proprietor
- Yes
Practice Information
- Address
-
1400 SHATTUCK AVE STE 12-216BERKELEY, CA, 947091411Browse CA providers · Browse ZIP 94709
- Phone
- 5102397024
- Primary Specialty
-
Clinical Psychologist
103TC0700X
Other Clinical Psychologist Providers in BERKELEY, CA
| Name | Credential | NPI |
|---|---|---|
| DR. STEPHEN CHARLES HALPERT | PSY.D. | 1386633725 |
| DR. STEVEN DON ALLEN | PH.D. | 1881677755 |
| DR. BRUCE LAWRENCE NEMIROW | PH.D. | 1780662825 |
| DR. BUTLER NELSON | PH.D. | 1588614846 |
| DR. ALISA CASTLETON NOWIK | PSY.D. | 1346292661 |
| DR. KATHERINE A. HATCH | PH.D. | 1316973316 |
Data sourced from the NPPES National Provider Identifier registry. This information is for informational purposes only and is not a substitute for verifying credentials with the appropriate licensing authority. For official verification, use the NPPES NPI Registry or the relevant state medical board.