Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Cortney Alice Oster

Counselor in Chehalis, WA · enumerated 2025.

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

National Provider Identifier

1225915309

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Registry record

Entity type Individual (Type 1)

Name Cortney Alice Oster

Sex Female

Practice address 135 W Main St, Chehalis, WA, 98532

Phone (360) 748-4339

Enumeration date Aug 19, 2025

Last updated in NPPES Aug 19, 2025

Taxonomy & licenses

101Y00000X Counselor Behavioral Health & Social Service Providers · License CG70040484 (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

Where does Cortney Oster practice?

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

What is the NPI number for Cortney Oster?

The National Provider Identifier (NPI) for Cortney Oster is 1225915309, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-08-19.