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John Trojanowski, PSYD
NPI 1073804910 · Clinical Psychologist · Berkeley, CA
John Trojanowski, PSYD is a Clinical Psychologist provider in Berkeley, CA (NPI 1073804910).
Provider details
- NPI number
- 1073804910
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PSYD
- Sex
- Male
- Sole proprietor
- Yes
- License
- PSY31863 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(81/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
15 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
1400 Shattuck Ave Ste 12-216
Berkeley, CA 94709-1411
Phone: (510) 239-7024
Street-level locationGet directions
Mailing address
1400 Shattuck Ave Ste 12-216
Berkeley, CA 94709-1411
Registry dates
- Enumerated
- 2011-04-26
- Last updated
- 2026-02-20
- Certified
- 2026-02-20
Frequently asked questions
- What is John Trojanowski's NPI number?
- John Trojanowski's National Provider Identifier (NPI) is 1073804910, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Trojanowski's specialty?
- John Trojanowski is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is John Trojanowski located?
- John Trojanowski's practice location on file with NPPES is 1400 Shattuck Ave Ste 12-216, Berkeley, CA 94709-1411.
- What is John Trojanowski's phone number?
- The practice phone number listed in the NPPES registry for John Trojanowski is (510) 239-7024.
- Is John Trojanowski's NPI active?
- Yes — John Trojanowski's NPI (1073804910) is active in the NPPES registry as of the last update on 2026-02-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.