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

DR. ROBERT A WILLIAMSON M.D.
NPI 1821095696
General Practice in Gonzales, TX

Q: What is Robert Williamson's NPI number?

The NPI number for Robert Williamson is 1821095696. It was assigned to this individual provider in the NPPES registry on July 7, 2005.

Q: What is Robert Williamson's specialty?

The primary specialty registered for this NPI is General Practice with taxonomy code 208D00000X.

Q: When was this NPI record last updated?

The NPPES record for Robert 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 46 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 July 07, 2005

1605 N SARAH DEWITT DR, GONZALES, TX 78629(830) 672-4601(830) 672-8101 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 23, 2026.

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About Dr. Robert A Williamson M.d. NPPES

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

DR. ROBERT A WILLIAMSON M.D. (NPI 1821095696) is an individual general practice provider in Gonzales, Texas, licensed in Texas (D9725) and active in the NPI registry since July 2005.

NPPES Registry Identity

NPI1821095696

Entity TypeIndividualMale

Primary Taxonomy208D00000X

Provider Legal NameDR. ROBERT A WILLIAMSONCredential: M.D.

Location Address1605 N SARAH DEWITT DRGonzales, TX 78629-2700

Mailing AddressPo Box 1840Gonzales, TX 78629-1340 · (830) 672-4601 · Fax (830) 672-8101

Phone(830) 672-4601

Fax(830) 672-8101

Sole ProprietorNo

Enumeration DateJuly 7, 2005

Last NPPES UpdateJuly 13, 2026

✔ NPI 1821095696 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyGeneral PracticeAllopathic & Osteopathic Physicians

Taxonomy Code208D00000X

License✔ Licensed in TX · D9725

Definition

A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions. Source: National Uniform Claim Committee

1605 N SARAH DEWITT DR, Gonzales, TX 78629

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Other Providers at the Same Location NPPES

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

DR. TERRY FULLER ESKA M.D.

Internal Medicine

1605 N SARAH DEWITT DR
GONZALES, TX 78629

Gonzales County (830) 672-4995

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 Robert Williamson's NPI number?

The NPI number for Robert Williamson is 1821095696. It was assigned to this individual provider in the NPPES registry on July 7, 2005.

Where is Robert Williamson located?

Robert Williamson practices at 1605 N Sarah Dewitt Dr, Gonzales, TX 78629. The listed phone number is (830) 672-4601.

What is Robert Williamson's specialty?

The primary specialty registered for this NPI is General Practice with taxonomy code 208D00000X.

When was this NPI record last updated?

The NPPES record for Robert 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 46 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.