Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MARK L WILLIAMSON IDC
NPI 1699743534
Military Health Care Provider - Independent Duty Corpsman in San Diego, CA

Q: What is Mark Williamson's NPI number?

The NPI number for Mark Williamson is 1699743534. It was assigned to this individual provider in the NPPES registry on March 8, 2006.

Q: What is Mark Williamson's specialty?

The primary specialty registered for this NPI is Military Health Care Provider, specializing in Independent Duty Corpsman, with taxonomy code 1710I1002X.

Q: When was this NPI record last updated?

The NPPES record for Mark Williamson 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 34 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.

Active since March 08, 2006

3325 SENN ROAD, COMDESRON ONE BUILDING 55 SECOND FLOOR, SAN DIEGO, CA 92136(619) 556-5002(619) 556-5003 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

On this page

About Mark L Williamson Idc NPPES

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

MARK L WILLIAMSON IDC (NPI 1699743534) is an individual independent duty corpsman provider in San Diego, California and active in the NPI registry since March 2006.

NPPES Registry Identity

NPI1699743534

Entity TypeIndividualMale

Primary Taxonomy1710I1002X

Provider Legal NameMARK L WILLIAMSONCredential: IDC

Location Address3325 SENN ROAD, COMDESRON ONE BUILDING 55 SECOND FLOORSan Diego, CA 92136

Mailing AddressComdesron One 3325 Senn Road, Building 55 Second FloorSan Diego, CA 92136 · (619) 556-5002 · Fax (619) 556-5003

Phone(619) 556-5002

Fax(619) 556-5003

Sole ProprietorNo

Enumeration DateMarch 8, 2006

Last NPPES UpdateJuly 13, 2026

✔ NPI 1699743534 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyMilitary Health Care Provider · Independent Duty CorpsmanOther Service Providers

Taxonomy Code1710I1002X

Definition

A Navy Independent Duty Corpsman (IDC) is an active duty Sailor who has successfully completed one of the Navy's specific IDC training programs. IDCs are formally trained and educated to perform primary medical care and minor surgical services in a variety of health care and non-health care settings worldwide under indirect physician supervision. IDCs provide care to Department of Defense operational forces and other supporting forces such as contractors and foreign nationals.

3325 SENN ROAD, San Diego, CA 92136

Open in Google Maps ↗

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 Mark Williamson's NPI number?

The NPI number for Mark Williamson is 1699743534. It was assigned to this individual provider in the NPPES registry on March 8, 2006.

Where is Mark Williamson located?

Mark Williamson practices at 3325 Senn Road Comdesron One Building 55 Second Floor, San Diego, CA 92136. The listed phone number is (619) 556-5002.

What is Mark Williamson's specialty?

The primary specialty registered for this NPI is Military Health Care Provider, specializing in Independent Duty Corpsman, with taxonomy code 1710I1002X.

When was this NPI record last updated?

The NPPES record for Mark Williamson 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 34 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.