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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

JOHN C. KNUDSEN M.D.
NPI 1083688790
Specialist in Mount Vernon, WA

Active since February 17, 2006
111 N 17TH ST, MOUNT VERNON, WA 98273(360) 424-4627(360) 848-6327 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About John C. Knudsen M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JOHN C. KNUDSEN M.D. (NPI 1083688790) is an individual specialist in Mount Vernon, Washington, licensed in Washington (MD0016795) and active in the NPI registry since February 2006.

NPPES Registry Identity

NPI1083688790
Entity TypeIndividualMale
Primary Taxonomy174400000X
Provider Legal NameJOHN C. KNUDSENCredential: M.D.
Location Address111 N 17TH STMount Vernon, WA 98273-3440
Mailing Address111 N 17th StMount Vernon, WA 98273-3440 · (360) 424-4627 · Fax (360) 848-6327
Phone(360) 424-4627
Fax(360) 848-6327
Sole ProprietorNo
Enumeration DateFebruary 17, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1083688790 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpecialistOther Service Providers
Taxonomy Code174400000X
License✔ Licensed in WA · MD0016795
Definition
An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.
111 N 17TH ST, Mount Vernon, WA 98273
Open in Google Maps ↗

Other Identifiers 1

Medicaid1647809WA

Other Providers at the Same Location NPPES 5

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

JUDITH L. CHILCOTE MSARNP
Nurse Practitioner (Women's Health)
111 N 17TH ST
MOUNT VERNON, WA 98273
Skagit County (360) 424-4627
DR. SARA C. ROWLAND M.D.
Obstetrics & Gynecology
111 N 17TH ST
MOUNT VERNON, WA 98273
Skagit County (360) 424-4627
RYAN CHARLES COONC DPT
Physical Therapist
111 N 17TH ST
MOUNT VERNON, WA 98273
Skagit County (360) 873-8356
SKAGIT HAND THERAPY LLC
Occupational Therapist
111 N 17TH ST
MOUNT VERNON, WA 98273
Skagit County (206) 200-8553
VINCENT THOMAS
Physical Therapist
111 N 17TH ST
MOUNT VERNON, WA 98273
Skagit County (360) 466-7458

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is John Knudsen's NPI number?

The NPI number for John Knudsen is 1083688790. It was assigned to this individual provider in the NPPES registry on February 17, 2006.

Where is John Knudsen located?

John Knudsen practices at 111 N 17th St, Mount Vernon, WA 98273. The listed phone number is (360) 424-4627.

What is John Knudsen's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

When was this NPI record last updated?

The NPPES record for John Knudsen was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 23 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.