Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MATTHEW THOMAS HENNESSY PSYD
NPI 1336191576
Psychologist - Group Psychotherapy in Atascadero, CA

Q: What is Matthew Hennessy's NPI number?

The NPI number for Matthew Hennessy is 1336191576. It was assigned to this individual provider in the NPPES registry on May 16, 2006.

Q: What is Matthew Hennessy's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Group Psychotherapy, with taxonomy code 103TP2701X.

Q: When was this NPI record last updated?

The NPPES record for Matthew Hennessy was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 40 days 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 May 16, 2006

10333 EL CAMINO REAL, ATASCADERO, CA 93423(805) 468-2000(805) 466-6011 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Jul 13, 2026, Sep 11, 2025 (2 updates tracked since 2025).

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About Matthew Thomas Hennessy Psyd NPPES

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

MATTHEW THOMAS HENNESSY PSYD (NPI 1336191576) is an individual group psychotherapy provider in Atascadero, California, licensed in California (PSY17421) and active in the NPI registry since May 2006.

NPPES Registry Identity

NPI1336191576

Entity TypeIndividualMale

Primary Taxonomy103TP2701X

Provider Legal NameMATTHEW THOMAS HENNESSYCredential: PSYD

Location Address10333 EL CAMINO REALAtascadero, CA 93423-7001

Mailing Address1600 9th St, Room 205 Mailstop 2-3Sacramento, CA 95814-6414 · (916) 654-2431 · Fax (916) 654-3186

Phone(805) 468-2000

Fax(805) 466-6011

Sole ProprietorNo

Enumeration DateMay 16, 2006

Last NPPES UpdateJuly 13, 20262 updates tracked since enumeration

✔ NPI 1336191576 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 6

★ Primary SpecialtyPsychologist · Group PsychotherapyBehavioral Health & Social Service Providers

Taxonomy Code103TP2701X

License✔ Licensed in CA · PSY17421

Definition

A psychologist who specializes in group psychology and group psychotherapy that is an evidenced-based specialty that prepares group leaders to identify and capitalize on developmental and healing possibilities embedded in the interpersonal/intrapersonal functioning of individual group members as well as collectively for the group. Emphasis is placed on the use of group dynamics to assist and treat individual group members. The specialty is applicable to all age groups, children, adolescents, adults and older adults, for a wide variety of conditions and concerns, and in numerous and diverse settings.

Also ListedPsychologistTaxonomy 103T00000X · License PSY17421 (CA)

Also ListedPsychologist · Cognitive & BehavioralTaxonomy 103TB0200X · License PSY17421 (CA)

Also ListedPsychologist · ClinicalTaxonomy 103TC0700X · License PSY17421 (CA)

Also ListedPsychologist · CounselingTaxonomy 103TC1900X · License PSY17421 (CA)

Also ListedPsychologist · ForensicTaxonomy 103TF0200X · License PSY17421 (CA)

10333 EL CAMINO REAL, Atascadero, CA 93423

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Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

JEFFREY FRANZ TEUBER PHD

Psychologist (Intellectual and Developmental Disabilities)