Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Melissa Matuszak, PH.D.

Psychologist in Ontario, CA · enumerated 2022.

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

National Provider Identifier

1396482055

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Registry record

Entity type Individual (Type 1)

Name Dr. Melissa Matuszak

Credential PH.D.

Sex Female

Practice address 1011 N Begonia Ave Ste 1009, Ontario, CA, 91762

Phone (800) 683-2945

Enumeration date May 15, 2022

Last updated in NPPES May 15, 2022

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License PSB94026633 (CA) Primary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD 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

Is NPI 1396482055 active?

Yes, as of the latest NPPES snapshot, NPI 1396482055 is active (record last updated 2022-05-15).

How do I verify Melissa Matuszak's NPI record?

Cross-check NPI 1396482055 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-05-15.