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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gregory Lynn Williams, PSY.D.

Clinical Psychologist in Olympia, WA · enumerated 2006.

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

National Provider Identifier

1326139361

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Registry record

Entity type Individual (Type 1)
Name Dr. Gregory Lynn Williams
Credential PSY.D.
Sex Male
Practice address 2118 Caton Way Sw, Olympia, WA, 98502
Phone (360) 754-4662
Fax (369) 352-3289
Enumeration date Sep 27, 2006
Last updated in NPPES Oct 31, 2008

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License PY00002410 (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
7119985 Medicaid WA -
0178084 Other WA L & I
1026WI Other WA REGENCE RIDER

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

Is NPI 1326139361 active?
Yes, as of the latest NPPES snapshot, NPI 1326139361 is active (record last updated 2008-10-31).
How do I verify Gregory Williams's NPI record?
Cross-check NPI 1326139361 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 2008-10-31.