Dr. John A. Walker
- Gender: Male
- Experience: 14 years
- Graduated from: University Of Texas Medical School At San Antonio
- Graduation year: 2007
- Sole propriator: No
- NPI: 1477780344
Dr. John A. Walker JR. M.D.
Vascular and Interventional Radiologist
He is located at 4502 Medical Drive in San Antonio, TX 78229. Can help patients with the following: Bleeding Varices, Blood Clots, Fluoroscopy, Kyphoplasty, MRI. His National Provider Identifier (NPI) number is 1477780344. Appointment can be made via the phone number (210) 358-4000. He is affiliated with 3 practices and 1 hospitals.
Conditions treated
Dr. John Allen Walker, being an vascular and interventional radiologist, treats the following conditions. Please be advised that this list may not be complete. For the full list of conditions treated, consult directly with Dr. John A. Walker.
- Bleeding Varices
- Blood Clots
- Fluoroscopy
- Kyphoplasty
- MRI
Procedures Performed by Dr. John A. Walker
ACA Marketplace (Obamacare/HealthCare.gov) plan networks
Insurers selling ACA Marketplace (HealthCare.gov) plans list Dr. John A. Walker as in-network for the following 2026 plans.
Health plans
Blue Cross and Blue Shield of Texas
Network data as of Jun 7, 2026, as reported by the insurer.
Show all 19 plans from Blue Cross and Blue Shield of Texas
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Blue Advantage Bronze HMO℠ 204 (27 plan variants) | HMO · Expanded Bronze | Blue Advantage HMO | Not accepting new patients |
| Blue Advantage Bronze HMO℠ 301 (14 plan variants) | HMO · Bronze | Blue Advantage HMO | Not accepting new patients |
| Blue Advantage Bronze HMO℠ Standard (27 plan variants) | HMO · Expanded Bronze | Blue Advantage HMO | Not accepting new patients |
| Blue Advantage Gold HMO℠ 206 (27 plan variants) | HMO · Gold | Blue Advantage HMO | Not accepting new patients |
| Blue Advantage Gold HMO℠ 603 (14 plan variants) | HMO · Gold | Blue Advantage HMO | Not accepting new patients |
| Blue Advantage Gold HMO℠ Standard (27 plan variants) | HMO · Gold | Blue Advantage HMO | Not accepting new patients |
| Blue Advantage Plus Bronze℠ 303 (27 plan variants) | POS · Expanded Bronze | Blue Advantage HMO | Not accepting new patients |
| Blue Advantage Plus Bronze℠ 305 (27 plan variants) | POS · Bronze | Blue Advantage HMO | Not accepting new patients |
| Blue Advantage Plus Bronze℠ Standard (27 plan variants) | POS · Expanded Bronze | Blue Advantage HMO | Not accepting new patients |
| Blue Advantage Plus Gold℠ 203 (27 plan variants) | POS · Gold | Blue Advantage HMO | Not accepting new patients |
| Blue Advantage Plus Gold℠ 803 (27 plan variants) | POS · Gold | Blue Advantage HMO | Not accepting new patients |
| Blue Advantage Plus Gold℠ Standard (27 plan variants) | POS · Gold | Blue Advantage HMO | Not accepting new patients |
| Blue Advantage Plus Silver℠ 202 (27 plan variants) | POS · Silver | Blue Advantage HMO | Not accepting new patients |
| Blue Advantage Plus Silver℠ 605 (27 plan variants) | POS · Silver | Blue Advantage HMO | Not accepting new patients |
| Blue Advantage Plus Silver℠ Standard (27 plan variants) | POS · Silver | Blue Advantage HMO | Not accepting new patients |
| Blue Advantage Security HMO℠ 200 (27 plan variants) | HMO · Catastrophic | Blue Advantage HMO | Not accepting new patients |
| Blue Advantage Silver HMO℠ 205 (27 plan variants) | HMO · Silver | Blue Advantage HMO | Not accepting new patients |
| Blue Advantage Silver HMO℠ 801 (14 plan variants) | HMO · Silver | Blue Advantage HMO | Not accepting new patients |
| Blue Advantage Silver HMO℠ Standard (27 plan variants) | HMO · Silver | Blue Advantage HMO | Not accepting new patients |
Community First
Network data as of May 18, 2026, as reported by the insurer.
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| University Community Care Plan by Community First - Gold Plan | EPO · Gold | Preferred | Accepting new patients |
| University Community Care Plan by Community First - Gold Plan Standard | EPO · Gold | Preferred | Accepting new patients |
| University Community Care Plan by Community First - Silver Plan | EPO · Silver | Preferred | Accepting new patients |
| University Community Care Plan by Community First - Silver Plan Standard | EPO · Silver | Preferred | Accepting new patients |
Harbor Health
Network data as of Sep 14, 2026, as reported by the insurer.
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Harbor Health G0 $0 Deductible $0 PCP $0 Mental Health Office Visit $0 Express Care | HMO · Gold | Preferred | Accepting new patients |
| Harbor Health G1S $30 PCP $30 Mental Health Office Visit $30 Express Care | HMO · Gold | Preferred | Accepting new patients |
| Harbor Health S1 $0 PCP $0 Mental Health Office Visit $0 Express Care | HMO · Silver | Preferred | Accepting new patients |
| Harbor Health S1S $40 PCP $40 Mental Health Office Visit $40 Express Care | HMO · Silver | Preferred | Accepting new patients |
Imperial Insurance Companies, Inc.
Network data as of Sep 16, 2025, as reported by the insurer.
Show all 7 plans from Imperial Insurance Companies, Inc.
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Imperial Preferred Bronze | HMO · Bronze | Preferred | Accepting new patients |
| Imperial Preferred Gold | HMO · Gold | Preferred | Accepting new patients |
| Imperial Preferred Gold Zero | HMO · Gold | Preferred | Accepting new patients |
| Imperial Preferred Silver | HMO · Silver | Preferred | Accepting new patients |
| Imperial Standard Bronze | HMO · Expanded Bronze | Standard | Accepting new patients |
| Imperial Standard Gold | HMO · Gold | Standard | Accepting new patients |
| Imperial Standard Silver | HMO · Silver | Standard | Accepting new patients |
This covers ACA Marketplace plans only, as reported by each insurer. It does not include employer, Medicare Advantage, or state-run exchange plans, and a plan missing from this list does not mean Dr. John A. Walker is out of network. Insurer directories can be out of date, so always confirm with the insurer and the office before your visit.
Medicare Enrollment
Dr. John A. Walker is enrolled to bill Medicare as a Practitioner - Diagnostic Radiology .
Bills through: University Of Texas Health Science Center At San Antonio
Based on Medicare's public enrollment records as of Jul 17, 2026. This reflects Medicare fee-for-service enrollment only and says nothing about other insurance, quality, outcomes, or board certification.
Payments received
Drug payment
| Biocompatibles | $918 |
| Boston Scientific | $129 |
| Ekos | $99 |
Other
| Travel and Lodging | $829 |
| Food and Beverage | $533 |
Studies
UNIVERSITY OF TEXAS MEDICAL SCHOOL AT SAN ANTONIO
Graduated in 2007Additional Specialities
- Radiologist
- Resident
Affiliated practices
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Questions & Answers
Where can you meet with Dr. John Allen Walker?
Dr. John Allen Walker's office is located at 4502 Medical Drive in San Antonio, TX 78229.
Does Dr. John Allen Walker have affiliation with practices?
Dr. John Allen Walker is affiliated with Surgery Center - Medical Center. For the full list of practices see this list.
Does Dr. John Allen Walker accept patients with Community First?
Yes, Dr. John Allen Walker is listed in-network for Community First through the ACA Marketplace (Obamacare/HealthCare.gov). See the Marketplace plans section for details.
What conditions does Dr. John Allen Walker treat?
Dr. John Allen Walker provides treatment for Bleeding Varices, Blood Clots, Fluoroscopy, Kyphoplasty, MRI.
Has Dr. John Allen Walker affiliation with hospitals?
Dr. John Allen Walker is affiliated with UNIVERSITY HEALTH SYSTEM.