Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Katharine Anne Willis, MS SLP

Speech-Language Pathologist in Vancouver, WA · enumerated 2008.

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

National Provider Identifier

1689833816

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Registry record

Entity type Individual (Type 1)

Name Katharine Anne Willis

Credential MS SLP

Sex Female

Practice address 2500 Ne 65th Ave, Vancouver, WA, 98661

Phone (503) 228-6479

Enumeration date Jun 3, 2008

Last updated in NPPES Jan 24, 2013

Taxonomy & licenses

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers · License 12995 (OR) 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 Katharine Willis?

The National Provider Identifier (NPI) for Katharine Willis is 1689833816, a Type 1 (individual) record in the CMS NPPES registry.

Where does Katharine Willis practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-01-24.