Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

John Pietrzak, PSY.D.

Clinical Psychologist in Topanga, CA · enumerated 2015.

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

National Provider Identifier

1922480946

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Registry record

Entity type Individual (Type 1)

Name John Pietrzak

Credential PSY.D.

Sex Male

Practice address Topanga, CA, 90290

Phone (310) 663-7163

Enumeration date Jun 25, 2015

Last updated in NPPES Dec 13, 2024

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License PSY27360 (CA) Primary

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

Other identifiers

Identifier	Type	State	Issuer
PSY27360	Other	CA	STATE LICENSE
CB240514	Medicaid	CA	-

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

How do I verify John Pietrzak's NPI record?

Cross-check NPI 1922480946 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1922480946 active?

Yes, as of the latest NPPES snapshot, NPI 1922480946 is active (record last updated 2024-12-13).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-12-13.