Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Seth P Cowan, A.R.N.P.

Family Nurse Practitioner in Mount Vernon, WA · enumerated 2006.

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

National Provider Identifier

1366501991

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Registry record

Entity type Individual (Type 1)

Name Seth P Cowan

Credential A.R.N.P.

Sex Male

Practice address 916 S 3rd St, Mount Vernon, WA, 98273

Phone (360) 336-5658

Fax (360) 336-5655

Enumeration date Dec 8, 2006

Last updated in NPPES May 21, 2024

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License RN00167322 (WA) Secondary

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License AP30007992 (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

Is NPI 1366501991 active?

Yes, as of the latest NPPES snapshot, NPI 1366501991 is active (record last updated 2024-05-21).

How do I verify Seth Cowan's NPI record?

Cross-check NPI 1366501991 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 2024-05-21.