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JOHN CHARLES WILLIAMSON M.D.
NPI 1073566709
Urology in Austin, TX

Active since May 17, 2006
4007 JAMES CASEY ST, C150, AUSTIN, TX 78745(512) 443-5988(512) 443-5055 Get Directions Write a Review

NPPES record last updated: July 31, 2013. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About John Charles Williamson M.d. NPPES

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

JOHN CHARLES WILLIAMSON M.D. (NPI 1073566709) is an individual urology provider in Austin, Texas, licensed in Texas (E6690) and active in the NPI registry since May 2006.

NPPES Registry Identity

NPI1073566709
Entity TypeIndividualMale
Primary Taxonomy208800000X
Provider Legal NameJOHN CHARLES WILLIAMSONCredential: M.D.
Location Address4007 JAMES CASEY ST, C150Austin, TX 78745-3369
Mailing Address1020 W 34th StAustin, TX 78705-2009 · (512) 687-1950 · Fax (512) 687-1490
Phone(512) 443-5988
Fax(512) 443-5055
Sole ProprietorNo
Enumeration DateMay 17, 2006
Last NPPES UpdateJuly 31, 2013
✔ NPI 1073566709 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyUrologyAllopathic & Osteopathic Physicians
Taxonomy Code208800000X
License✔ Licensed in TX · E6690
Definition
A urologist manages benign and malignant medical and surgical disorders of the genitourinary system and the adrenal gland. This specialist has comprehensive knowledge of and skills in endoscopic, percutaneous and open surgery of congenital and acquired conditions of the urinary and reproductive systems and their contiguous structures.
4007 JAMES CASEY ST, Austin, TX 78745
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Other Identifiers 2

Medicaid114581504TX
Medicare PIN8F6342

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas.Insurance ›

Other Providers at the Same Location NPPES 19

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

SASAN ASKARI, MD PA
Obstetrics & Gynecology
4007 JAMES CASEY ST, STE A 250
AUSTIN, TX 78745
Travis County (512) 444-2111
NANCY P. MATTEER, M.D., P.A.
Internal Medicine (Gastroenterology)
4007 JAMES CASEY ST, SUITE C 210
AUSTIN, TX 78745
Travis County (512) 447-8466
MR. SASAN ASKARI M.D.
Obstetrics & Gynecology
4007 JAMES CASEY ST, SUITE A-250
AUSTIN, TX 78745
Travis County (512) 444-2111
MALLETT MD, PA
Family Medicine
4007 JAMES CASEY ST, SUITE A-200
AUSTIN, TX 78745
Travis County (512) 441-4400
AUSTIN PULMONARY CONSULTANTS, PA
Clinical Nurse Specialist (Adult Health)
4007 JAMES CASEY ST, B-200
AUSTIN, TX 78745
Travis County (512) 441-9799
BARBARA HOWARD WHNP
Clinical Nurse Specialist (Women's Health)
4007 JAMES CASEY ST, SUITE A240
AUSTIN, TX 78745
Travis County (512) 394-0054
CASEY THOMAS MULCIHY - AUSTIN TEXAS
Pediatrics
4007 JAMES CASEY ST, SUITE D200
AUSTIN, TX 78745
Travis County (512) 447-5588
RN POONAWALA PA
Specialist
4007 JAMES CASEY ST, SUITE D240
AUSTIN, TX 78745
Travis County (512) 440-8989

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 Williamson's NPI number?

The NPI number for John Williamson is 1073566709. It was assigned to this individual provider in the NPPES registry on May 17, 2006.

Where is John Williamson located?

John Williamson practices at 4007 James Casey St C150, Austin, TX 78745. The listed phone number is (512) 443-5988.

What is John Williamson's specialty?

The primary specialty registered for this NPI is Urology with taxonomy code 208800000X.

What insurance does John Williamson accept?

Health plans from Blue Cross and Blue Shield of Texas list John Williamson as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for John Williamson was last updated on July 31, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 years 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.