Dr. John Allen Walker Jr., MD

Dr. Walker practices at University Hospital (San Antonio) in San Antonio, Texas.

Dr. Walker's NPI, 1477780344, was assigned on June 17, 2009. Dr. Walker graduated from Joe R. & Teresa Lozano Long School of Medicine in 2007. Dr. Walker holds Texas license P1944.

Dr. Walker's primary practice is University Hospital (San Antonio), at 4502 Medical Dr, San Antonio, TX 78229 in Bexar County. The practice phone is (210) 358-4000.

Dr. Walker's primary practice is University Hospital (San Antonio) in San Antonio, Texas. Dr. Walker is also affiliated with University Hospital. The medical group on file is UT Health Physicians. Dmand AI also links Dr. Walker to 1 more hospital, named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Walker practices, 2 sites in all. Vendor and product names are available with a free account.

Vascular and interventional radiology is Dr. Walker's primary specialty in the NPI Registry, under taxonomy code 2085R0204X. Dr. Walker is board certified in diagnostic radiology by the American Board of Radiology. Dr. Walker is licensed in Texas.

CMS data shows 366 Medicare services from Dr. Walker across 13 procedure codes in 2024, for 222 Medicare patients. Medicare paid $13,671 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 222 Medicare patients who saw Dr. Walker in 2024. The largest group is 65 to 74, with 99 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 25% are also on Medicaid. Their average risk score is 3.21, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Walker's median patient age at 67, with 57% women.

In 2024, Dr. Walker wrote 41 Medicare Part D claims for 20 patients. 100% of them were for generic drugs. CMS names the drug for 39 of them, across 2 drugs with 11 or more claims each, at $319 in total drug cost. In 2023, CMS named 31 claims across 1 drug.

Dr. Walker accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Dmand AI links 17 papers to Dr. Walker, published from 2011 to 2024. 2021 was the busiest year, with 2. The most frequent topics are Tissue Scaffolds, Bone Regeneration and Rabbits. Dr. Walker has published most often in J Craniofac Surg. Dr. Walker's most frequent co-authors are Jorge E. Lopera, MD, Carlos Brandon Ortiz, MD and Joyce G. Afran, MD.

CMS Open Payments shows 90 general payments to Dr. Walker from 24 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 46% of the total. Guerbet LLC paid the most, $15,000.

Dr. Walker graduated from Joe R. & Teresa Lozano Long School of Medicine in 2007.

Dr. Walker is in network with 17 carriers, including Aetna, Elevance and United Healthcare. HMO plans come from the most carriers, 11. Check the plan with the practice before a visit.