Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Marie Katherine Mcmahon, PSYD

Psychologist in Vancouver, WA · enumerated 2006.

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

National Provider Identifier

1790852754

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Registry record

Entity type Individual (Type 1)

Name Dr. Marie Katherine Mcmahon

Credential PSYD

Sex Female

Practice address 400 E Evergreen Blvd, Suite #311, Vancouver, WA, 98660

Phone (360) 686-9594

Fax (360) 906-7111

Enumeration date Nov 28, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License 1636 (OR) Secondary

103T00000X Psychologist Behavioral Health & Social Service Providers · License PY00003105 (WA) Primary

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

Other identifiers

Identifier	Type	State	Issuer
7133002	Medicaid	WA	-

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.

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Frequently asked questions

How do I verify Marie Mcmahon's NPI record?

Cross-check NPI 1790852754 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1790852754 active?

Yes, as of the latest NPPES snapshot, NPI 1790852754 is active (record last updated 2007-07-08).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.