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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John C. Knudsen, M.D.

Specialist in Mount Vernon, WA · enumerated 2006 · practices at Skagit Hand Therapy LLC.

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

National Provider Identifier

1083688790

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Registry record

Entity type Individual (Type 1)
Name John C. Knudsen
Credential M.D.
Sex Male
Practice address 111 N 17th St, Mount Vernon, WA, 98273
Phone (360) 424-4627
Fax (360) 848-6327
Enumeration date Feb 17, 2006
Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

174400000X Specialist Other Service Providers · License MD0016795 (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
1647809 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.

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Frequently asked questions

How do I verify John Knudsen's NPI record?
Cross-check NPI 1083688790 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1083688790 active?
Yes, as of the latest NPPES snapshot, NPI 1083688790 is active (record last updated 2007-07-08).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.