JOHN TROJANOWSKI PSYD
NPI 1073804910
Psychologist - Clinical in Berkeley, CA

Q: What is John Trojanowski's NPI number?

The NPI number for John Trojanowski is 1073804910. It was assigned to this individual provider in the NPPES registry on April 26, 2011.

Q: What is John Trojanowski's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

Q: When was this NPI record last updated?

The NPPES record for John Trojanowski was last updated on February 20, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since April 26, 2011

1400 SHATTUCK AVE STE 12-216, BERKELEY, CA 94709(510) 239-7024 Get Directions Write a Review

NPPES record last updated: February 20, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

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About John Trojanowski Psyd NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JOHN TROJANOWSKI PSYD (NPI 1073804910) is an individual clinical provider in Berkeley, California, licensed in California (PSY31863) and active in the NPI registry since April 2011.

NPPES Registry Identity

NPI1073804910

Entity TypeIndividualMale

Primary Taxonomy103TC0700X

Provider Legal NameJOHN TROJANOWSKICredential: PSYD

Location Address1400 SHATTUCK AVE STE 12-216Berkeley, CA 94709-1411

Mailing Address1400 Shattuck Ave Ste 12-216Berkeley, CA 94709-1411 · (510) 239-7024

Phone(510) 239-7024

Sole ProprietorYes

Enumeration DateApril 26, 2011

Last NPPES UpdateFebruary 20, 2026

NPPES CertifiedFebruary 20, 2026

✔ NPI 1073804910 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologist · ClinicalBehavioral Health & Social Service Providers

Taxonomy Code103TC0700X

License✔ Licensed in CA · PSY31863

Definition

A psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a specialty in breadth -- one that is broadly inclusive of severe psychopathology -- and marked by comprehensiveness and integration of knowledge and skill from a broad array of disciplines within and outside of psychology proper. The scope of clinical psychology encompasses all ages, multiple diversities and varied systems.

1400 SHATTUCK AVE STE 12-216, Berkeley, CA 94709

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Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is John Trojanowski's NPI number?

The NPI number for John Trojanowski is 1073804910. It was assigned to this individual provider in the NPPES registry on April 26, 2011.

Where is John Trojanowski located?

John Trojanowski practices at 1400 Shattuck Ave Ste 12-216, Berkeley, CA 94709. The listed phone number is (510) 239-7024.

What is John Trojanowski's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

When was this NPI record last updated?

The NPPES record for John Trojanowski was last updated on February 20, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.