Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Gary Scott Sims, S.U.D.P.

Q: What is the NPI number for Gary Sims?

The National Provider Identifier (NPI) for Gary Sims is 1538370960, a Type 1 (individual) record in the CMS NPPES registry.

Addiction (Substance Use Disorder) Counselor in Oakville, WA · enumerated 2007.

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

National Provider Identifier

1538370960

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Registry record

Entity type Individual (Type 1)

Name Mr. Gary Scott Sims

Credential S.U.D.P.

Sex Male

Practice address Po Box 508, Oakville, WA, 98568

Phone (360) 709-1661

Fax (707) 274-4628

Enumeration date May 25, 2007

Last updated in NPPES Jul 24, 2025

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License CP00001819 (WA) Primary

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 is the NPI number for Gary Sims?

The National Provider Identifier (NPI) for Gary Sims is 1538370960, a Type 1 (individual) record in the CMS NPPES registry.

Where does Gary Sims practice?

The practice location on file with NPPES is in Oakville, WA. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-07-24.