Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mariah Diane Corey, PHD

Psychologist in Seatac, WA · enumerated 2024.

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

National Provider Identifier

1942028386

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Registry record

Entity type Individual (Type 1)

Name Mariah Diane Corey

Credential PHD

Sex Female

Practice address 4040 S 188th St Ste 201, Seatac, WA, 98188

Phone (206) 277-7200

Fax (206) 277-7202

Enumeration date Oct 2, 2024

Last updated in NPPES Jul 7, 2026

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License PY61663553 (WA) Secondary

103T00000X Psychologist Behavioral Health & Social Service Providers · License PY61663553 (WA) 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 Mariah Corey?

Mariah Corey 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 2026-07-07.