John Allen Walker, M.D.
Vascular & Interventional Radiology Physician · San Antonio, TX
John Allen Walker, M.D. is a vascular & interventional radiology physician with a practice address in San Antonio, Texas, and NPI 1477780344, issued on Jun 17, 2009. Check the license (Texas P1944, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- John Allen Walker
- Credential
- M.D.
- Primary taxonomy
- Vascular & Interventional Radiology Physician 2085R0204X
- License number
- P1944 TX
Self-reported in NPPES; status is on the state search - Practice location
- 4502 Medical Dr, San Antonio, TX 78229
- Phone
- (210) 358-4000
- Enumerated
- Jun 17, 2009
- Record last updated
- Dec 11, 2024
- Fax
- (210) 567-6418
- Medicaid ID
- 357906201 TX
- Medicare enrollment
- Enrolled (PECOS I20160511000109); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical School At San Antonio, 2007
- Entity
- Type 1 · individual
8 nearest vascular & interventional radiology physician records → All 324 in Texas → Look up another NPI →
Also registered at 4502 Medical Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Aaron Abarbanell, MDThoracic Surgery (Cardiothoracic Vascular Surgery) Physician1245497809
- Ayham AbdelAnesthesiology Physician1467147496
- Ali Abedi, M.D.Pulmonary Disease Physician1346566312
- Jordan Abel, M.D.Infectious Disease Physician1417273301
- Aesha Aboueisha, MDHospitalist Physician1225527815
- Seena Abraham, MDFamily Medicine Physician1306338561
Verify John Allen Walker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license P1944Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
45% fewer Medicare Part D claims than the average vascular & interventional radiology physician in 2024
41 Medicare Part D claims for 20 beneficiaries, against an average of 75 among the 1,444 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 22 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen20 claims
- Ondansetron Odt19 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.
Industry payments in 2024: $11,806.87
23 payments; by number, the most common kind was food and beverage; the largest payer was Guerbet LLC. The 3,457 providers of this specialty with any payment received $7,206.73 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 one group practice
- University OF Texas Health Science Center AT San AntonioSan Antonio, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Allen Walker among 324 vascular & interventional radiology physician records in Texas
John Allen Walker, M.D. is one of 324 vascular & interventional radiology physician records with a practice address in Texas. 94% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 42% of them.
- NPI issued2009 · 42% of these records are older, 51% newer
- In a Medicare fileYes · 94% of these records are
- In the CMS Doctors and Clinicians fileYes · 88% of these records are
- Graduated2007 · median 2008 among the 284 with a school on file
- Record last updated2024 · 33% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0204X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Vascular & Interventional Radiology Physician providers in Texas
There are 324 vascular & interventional radiology physician records in Texas.
All 324 in Texas → Every provider in San Antonio → Vascular & Interventional Radiology Physician nationwide →
The 8 vascular & interventional radiology physician records with the nearest ZIP codes
- Laura Barnes, M.D.San Antonio, TX 782291134419302
- Andrew Chesley, M.D.San Antonio, TX 782291497101489
- Brandon Childers, M.D.San Antonio, TX 782291366701567
- Stephen Dooley, M.D.San Antonio, TX 782291093158024
- Beatriz Escobar, M.D.San Antonio, TX 782291649256447
- Andres Garza Berlanga, M.D.San Antonio, TX 782291124256755
- Anish Gonchigar, MDSan Antonio, TX 782291336671924
- Ghazwan Kroma, M.D.San Antonio, TX 782291720116056
Common questions
What is John Allen Walker, M.D.'s NPI number?
John Allen Walker, M.D.'s National Provider Identifier (NPI) is 1477780344, issued on Jun 17, 2009. An NPI identifies a provider in billing; it is not a license.
Where is John Allen Walker, M.D. located?
The NPPES record lists a practice address at 4502 Medical Dr, San Antonio, TX, 78229. Phone: (210) 358-4000. Providers update this record themselves, so call before visiting.
How can I verify John Allen Walker, M.D.'s license?
NPPES lists Texas license number P1944, 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 Allen Walker, M.D. prescribe under Medicare Part D?
In 2024, John Allen Walker, M.D. had 41 Medicare Part D claims for 20 beneficiaries; the average among vascular & interventional radiology physician prescribers was 75. Part D covers Medicare prescriptions only.
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.