Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Ann M Knowles, M.D.

Internal Medicine Physician in Everett, WA · enumerated 2006.

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

National Provider Identifier

1669404562

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Registry record

Entity type Individual (Type 1)

Name Dr. Ann M Knowles

Credential M.D.

Sex Female

Practice address 3927 Rucker Ave, Everett, WA, 98201

Phone (425) 339-5442

Enumeration date Jul 7, 2006

Last updated in NPPES Jul 8, 2026

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MD00035979 (WA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
080148615	Other	WA	RAILROAD MEDICARE
8924384	Other	WA	L&I CRIME VICTIM
423898049	Other	WA	GROUP HEALTH COOPERATIVE
67444	Other	WA	REGENCE BLUESHIELD
8223919	Medicaid	WA	-
0131540	Other	WA	L&I REGULAR

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.

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Frequently asked questions

How do I verify Ann Knowles's NPI record?

Cross-check NPI 1669404562 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1669404562 active?

Yes, as of the latest NPPES snapshot, NPI 1669404562 is active (record last updated 2026-07-08).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-07-08.