Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Peter Youssef

Psychologist in San Dimas, CA · enumerated 2021.

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

National Provider Identifier

1235714171

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Peter Youssef

Sex Male

Practice address 150 W Foothill Blvd Unit A, San Dimas, CA, 91773

Phone (626) 507-3585

Enumeration date Mar 12, 2021

Last updated in NPPES Mar 27, 2025

Taxonomy & licenses

106S00000X Behavior Technician Behavioral Health & Social Service Providers Secondary

103T00000X Psychologist Behavioral Health & Social Service Providers · License PSB94028038 (CA) Primary

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

Where does Peter Youssef practice?

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

What is the NPI number for Peter Youssef?

The National Provider Identifier (NPI) for Peter Youssef is 1235714171, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Jaydee Hughes Marriage & Family Therapist · San Dimas, CA NPI 1689707416 Sylvie Abadjian Marriage & Family Therapist · San Dimas, CA NPI 1861746687 Yaneth Puentes Marriage & Family Therapist · San Dimas, CA NPI 1790336634 Jesselyn Fernandez Marriage & Family Therapist · San Dimas, CA NPI 1932894052 Arianna Hullings Marriage & Family Therapist · San Dimas, CA NPI 1871337139 Lorene Deatley Professional Counselor · San Dimas, CA NPI 1366250359 Paiwen Wang Marriage & Family Therapist · San Dimas, CA NPI 1841166030 Jacqueline Ocampo Mental Health Counselor · San Dimas, CA NPI 1689540841

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-03-27.