Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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John Trojanowski, PSYD

Individual provider Clinical Psychologist · NPI 1073804910

John Trojanowski, PSYD is a Clinical Psychologist in Berkeley, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2011
What do these letters mean?
PSYD — Doctor of Psychology
A doctoral psychologist trained primarily for clinical practice.

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Practice location Address checks out

1400 Shattuck Ave Ste 12-216
Berkeley, CA 94709-1411
Phone: (510) 239-7024
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Psychologist (primary) Taxonomy 103TC0700X · Licence PSY31863 (CA)

Record details

NPI number1073804910
Entity typeIndividual (Type 1)
GenderMale
Credentials PSYD
Sole proprietorYes
NPI enumeratedApril 26, 2011
Last updated in NPPESFebruary 20, 2026
Certification dateFebruary 20, 2026
Mailing address1400 Shattuck Ave Ste 12-216, Berkeley, CA 94709-1411

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