Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ellyn C. Thoreen, ARNP

Nurse Practitioner in Arlington, WA · enumerated 2006.

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

National Provider Identifier

1609977016

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Registry record

Entity type Individual (Type 1)

Name Ellyn C. Thoreen

Credential ARNP

Sex Female

Practice address 3823 - 172nd St Ne, Cascade Skagit Health Alliance, Arlington, WA, 98223

Phone (360) 651-8365

Fax (360) 651-8368

Enumeration date Sep 26, 2006

Last updated in NPPES Feb 9, 2012

Taxonomy & licenses

363LW0102X Women's Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License AP30003177 (WA) Secondary

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License AP30003177 (WA) Primary

Other identifiers

Identifier	Type	State	Issuer
9609231	Medicaid	WA	-

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

How do I verify Ellyn Thoreen's NPI record?

Cross-check NPI 1609977016 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1609977016 active?

Yes, as of the latest NPPES snapshot, NPI 1609977016 is active (record last updated 2012-02-09).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-02-09.