NPI age
20 years
Enumerated 2006-05-17
● Active
Type 1 · Individual
John Charles Williamson, M.D.
Williamson is 1 of 52 urology providers in Austin and 1 of 1194 in Texas.
Primary specialty
Urology
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2013-07-31
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 1194 active urology providers in Texas.
NPI age
20 years
≈ at median (19 yr)
State licenses
1 state
12% of peers hold multiple states
Subspecialties
0
22% of peers hold subspecialties
NPI lifetime · 2006 → 2026
2006-05Enumerated in NPPES
2006
2026
Where they practice
Practice location
4007 James Casey St, C150
Austin, TX 787453369
Mailing address
1020 W 34th St
Austin, TX 787052009
Specialties
-
Urology PrimaryA 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...
Identifiers
| Type | Value | Notes |
|---|---|---|
| 05 (TX) | 114581504 |
Practice context
Part of a multi-provider practice. 21 other active providers share this practice address in NPPES.
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- Confirm the NPI on NPPES.The CMS registry is the system of record. Open NPPES →
- Check the state license is currently active.State licensing boards publish current status; NPPES does not.
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