NPPES file of Aug 9, 2026

John Charles Williamson, M.D.

Urology Physician · Austin, TX

John Charles Williamson, M.D. is a urology physician with a practice address in Austin, Texas, and NPI 1073566709, issued on May 17, 2006. Check the license (Texas E6690, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1073566709
Name
John Charles Williamson
Credential
M.D.
Primary taxonomy
Urology Physician 208800000X
License number
E6690 TX
Self-reported in NPPES; status is on the state search
Practice location
4007 James Casey St, Austin, TX 78745
Phone
(512) 443-5988
Enumerated
May 17, 2006
Record last updated
Jul 31, 2013 (not updated in 13 years: call before relying on the address or phone)
Fax
(512) 443-5055
Medicaid ID
114581504 TX
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest urology physician records → All 960 in Texas → Look up another NPI →

Also registered at 4007 James Casey St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Sasan Askari, M.D.Obstetrics & Gynecology Physician1013986843
  2. Anne Epstein, M.D.Dermatology Physician1912964172
  3. David Folkers, M.D.Surgery Physician1538265442
  4. Barbara Howard, WHNPWomen's Health Clinical Nurse Specialist1346540572
  5. Larry Lewellyn, D.O.Pediatrics Physician1821064098
  6. Harvey Worchel, M.D.Surgery Physician1841271483

Verify John Charles Williamson in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersTexas Medical Board
    Search for license E6690    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Texas license search

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Industry payments in 2024: $19.84

1 payment: food and beverage; the largest payer was Boston Scientific Corporation. The 9,340 providers of this specialty with any payment received $3,800.04 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. John Williamson$19.84
  2. Specialty average$3,800.04

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

John Charles Williamson among 960 urology physician records in Texas

John Charles Williamson, M.D. is one of 960 urology physician records with a practice address in Texas. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 18% of them.

  • NPI issued2006 · 18% of these records are older, 48% newer
  • In a Medicare fileYes · 82% of these records are
  • In the CMS Doctors and Clinicians fileNo · 69% of these records are
  • Record last updated2013 · 58% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208800000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Urology Physician providers in Texas

There are 960 urology physician records in Texas.

All 960 in Texas → Every provider in Austin → Urology Physician nationwide →

The 8 urology physician records with the nearest ZIP codes

  1. Bethany Burge, M.D.Austin, TX 787451205135944
  2. Michael Floyd, MDAustin, TX 787451861445280
  3. Parviz Kavoussi, MDAustin, TX 787451023271301
  4. Robert Northway, MDAustin, TX 787451982657367
  5. Edward Osterberg, M.D.Austin, TX 787451477795458
  6. David Phillips, MDAustin, TX 787451871546283
  7. Steven Pickett, MDPHDAustin, TX 787451417923186
  8. Peter Ruff, MDAustin, TX 787451487646790

Common questions

What is John Charles Williamson, M.D.'s NPI number?

John Charles Williamson, M.D.'s National Provider Identifier (NPI) is 1073566709, issued on May 17, 2006. An NPI identifies a provider in billing; it is not a license.

Where is John Charles Williamson, M.D. located?

The NPPES record lists a practice address at 4007 James Casey St, Austin, TX, 78745. Phone: (512) 443-5988. Providers update this record themselves, so call before visiting.

How can I verify John Charles Williamson, M.D.'s license?

NPPES lists Texas license number E6690, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.