Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Matthew Thomas Hennessy, PSYD

Group Psychotherapy Psychologist in Atascadero, CA · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1336191576

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Matthew Thomas Hennessy

Credential PSYD

Sex Male

Practice address 10333 El Camino Real, Atascadero, CA, 93423

Phone (805) 468-2000

Fax (805) 466-6011

Enumeration date May 16, 2006

Last updated in NPPES Sep 11, 2025

Taxonomy & licenses

103TB0200X Cognitive & Behavioral Psychologist Behavioral Health & Social Service Providers · License PSY17421 (CA) Secondary

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License PSY17421 (CA) Secondary

103TC1900X Counseling Psychologist Behavioral Health & Social Service Providers · License PSY17421 (CA) Secondary

103TF0200X Forensic Psychologist Behavioral Health & Social Service Providers · License PSY17421 (CA) Secondary

103T00000X Psychologist Behavioral Health & Social Service Providers · License PSY17421 (CA) Secondary

103TP2701X Group Psychotherapy Psychologist Behavioral Health & Social Service Providers · License PSY17421 (CA) Primary

PSYD · Doctor of Psychology: A clinical doctorate in psychology focused on professional practice. About the PSYD credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Matthew Hennessy?

The National Provider Identifier (NPI) for Matthew Hennessy is 1336191576, a Type 1 (individual) record in the CMS NPPES registry.

Where does Matthew Hennessy practice?

The practice location on file with NPPES is in Atascadero, CA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.