Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

John C. Williamson, MD

Organization Specialist · NPI 1578514311

John C. Williamson, MD is a Specialist in Austin, Texas. Registered with an NPI since 2006.

In the registry since
2006

Practice location Address checks out

4007 James Casey St C150
Austin, TX 78745-3369
Phone: (512) 617-3522
Fax: (512) 443-1062
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Specialist (primary) Taxonomy 174400000X

Record details

NPI number1578514311
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Monica Moore — Billing Manager · (512) 617-3522
Other names Capitol Urology Associates
NPI enumeratedMay 15, 2006
Last updated in NPPESAugust 14, 2008
Mailing address4007 James Casey St, C150, Austin, TX 78745-3369

Other providers in Austin