Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Katharine M Mason-Ellis, PA-C

Physician Assistant in Clackamas, OR · enumerated 2017.

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

National Provider Identifier

1174047393

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Registry record

Entity type Individual (Type 1)

Name Katharine M Mason-Ellis

Credential PA-C

Sex Female

Practice address 10151 Se Sunnyside Rd Ste 100, Clackamas, OR, 97015

Phone (503) 659-0880

Fax (503) 513-7425

Enumeration date Jul 30, 2017

Last updated in NPPES Apr 28, 2025

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License PA60779453 (WA) Secondary

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License PA202574 (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

Where does Katharine Mason-Ellis practice?

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

What is the NPI number for Katharine Mason-Ellis?

The National Provider Identifier (NPI) for Katharine Mason-Ellis is 1174047393, 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 2025-04-28.