John Andrew Williamson, M.D.
Diagnostic Radiology Physician · Austin, TX
John Andrew Williamson, M.D. is a diagnostic radiology physician with a practice address in Austin, Texas, and NPI 1083732176, issued on Mar 27, 2007. Check the license (Texas N3389, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- John Andrew Williamson
- Credential
- M.D.
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License number
- N3389 TX
Self-reported in NPPES; status is on the state search - Practice location
- 12554 Riata Vista Cir, Austin, TX 78727
- Phone
- (512) 795-5100
- Enumerated
- Mar 27, 2007
- Record last updated
- Mar 15, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (512) 795-5122
- Medicare enrollment
- Enrolled (PECOS I20090728000140); accepts Medicare assignment
- Medical or professional school
- Duke University School Of Medicine, 1998
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest diagnostic radiology physician records → All 3,124 in Texas → Look up another NPI →
Also registered at 12554 Riata Vista Cir
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Joshua AbramowitzDiagnostic Radiology Physician1689676975
- Stephen Agatston, MDDiagnostic Radiology Physician1518966043
- Tariq Alam, M.D.Diagnostic Radiology Physician1174642839
- Booth Aldred, M.D.Neuroradiology Physician1972823599
- Michael Aronoff, MDDiagnostic Radiology Physician1457353625
Verify John Andrew Williamson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license N3389Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
22% fewer Medicare Part D claims than the average diagnostic radiology physician in 2024
40 Medicare Part D claims, against an average of 51 among the 2,711 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 83.1 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $492.46
8 payments; by number, the most common kind was food and beverage; the largest payer was Boston Scientific Corporation. The 8,048 providers of this specialty with any payment received $2,488.38 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Austin Radiological AssociationAustin, TX
- Singleton Associates PAAustin, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Andrew Williamson among 3,124 diagnostic radiology physician records in Texas
John Andrew Williamson, M.D. is one of 3,124 diagnostic radiology physician records with a practice address in Texas. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 51% of them.
- NPI issued2007 · 51% of these records are older, 39% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated1998 · median 2003 among the 2,277 with a school on file
- Record last updated2018 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Diagnostic Radiology Physician providers in Texas
There are 3,124 diagnostic radiology physician records in Texas.
All 3,124 in Texas → Every provider in Austin → Diagnostic Radiology Physician nationwide →
The 8 diagnostic radiology physician records with the nearest ZIP codes
- Joshua AbramowitzAustin, TX 787271689676975
- Michael Aronoff, MDAustin, TX 787271457353625
- Sarah Avery, M.D.Austin, TX 787271770585937
- Hillel Ben-Avi, MDAustin, TX 787271841294790
- Bradley Brenner, MDAustin, TX 787271043214901
- Lauren Brown, MDAustin, TX 787271124022991
- Chris Butschek, MDAustin, TX 787271174527048
- Gregory Connor, MDAustin, TX 787271013911783
Common questions
What is John Andrew Williamson, M.D.'s NPI number?
John Andrew Williamson, M.D.'s National Provider Identifier (NPI) is 1083732176, issued on Mar 27, 2007. An NPI identifies a provider in billing; it is not a license.
Where is John Andrew Williamson, M.D. located?
The NPPES record lists a practice address at 12554 Riata Vista Cir, Austin, TX, 78727. Phone: (512) 795-5100. Providers update this record themselves, so call before visiting.
How can I verify John Andrew Williamson, M.D.'s license?
NPPES lists Texas license number N3389, 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.
How much does John Andrew Williamson, M.D. prescribe under Medicare Part D?
In 2024, John Andrew Williamson, M.D. had 40 Medicare Part D claims; the average among diagnostic radiology physician prescribers was 51. Part D covers Medicare prescriptions only.
What is John Andrew Williamson, M.D.'s MIPS final score?
The 2023 MIPS final score is 83.1 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.
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.