Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William J. Brooks, PA-C

Medical Physician Assistant in Arlington, WA · enumerated 2007.

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

National Provider Identifier

1639378565

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Registry record

Entity type Individual (Type 1)

Name William J. Brooks

Credential PA-C

Sex Male

Practice address 3823 - 172nd St Ne, Arlington, WA, 98223

Phone (360) 657-8700

Fax (360) 657-8720

Enumeration date Jul 11, 2007

Last updated in NPPES Feb 19, 2015

Taxonomy & licenses

363AM0700X Medical Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License PA03292 (TX) Secondary

363AM0700X Medical Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License PA100003054 (WA) Secondary

363AM0700X Medical Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License PA10003054 (WA) Primary

Other identifiers

Identifier	Type	State	Issuer
263802	Other	WA	LABOR & INDUSTRIES

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 1639378565 active?

Yes, as of the latest NPPES snapshot, NPI 1639378565 is active (record last updated 2015-02-19).

How do I verify William Brooks's NPI record?

Cross-check NPI 1639378565 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 2015-02-19.