Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Michael Stewart, PH.D.

Psychologist in Calipatria, CA · enumerated 2007.

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

National Provider Identifier

1063634392

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Registry record

Entity type Individual (Type 1)

Name Dr. Michael Stewart

Credential PH.D.

Sex Male

Practice address 7018 Blair Rd, Calipatria, CA, 92233

Phone (760) 348-7000

Enumeration date May 3, 2007

Last updated in NPPES Nov 11, 2022

Taxonomy & licenses

103G00000X Clinical Neuropsychologist Behavioral Health & Social Service Providers · License PSY15615 (CA) Secondary

103T00000X Psychologist Behavioral Health & Social Service Providers · License PSY15615 (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

What specialty is Michael Stewart?

Michael Stewart is registered in NPPES with the primary taxonomy of Psychologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-11-11.