Dr. John Patrick Walker, MD

Dr. Walker practices at John Sealy Hospital in Galveston, Texas, part of The University of Texas System.

Dr. Walker's NPI, 1205948775, was assigned on August 31, 2006. Dr. Walker graduated from UTMB Health in 1981. Dr. Walker holds Texas license G0254.

Dr. Walker's primary practice is John Sealy Hospital, at 301 University Boulevard, Galveston, TX 77555 in Galveston County. The practice phone is (409) 772-1011.

Dr. Walker's primary practice is John Sealy Hospital in Galveston, Texas, part of The University of Texas System. The medical group on file is UTMB Faculty Group Practice. Dmand AI also links Dr. Walker to 2 more group practices and clinics and 2 medical groups, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Walker practices, 3 sites in all. Vendor and product names are available with a free account.

Surgery is Dr. Walker's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Walker is board certified in surgery by the American Board of Surgery. Dr. Walker is licensed in Texas.

CMS data shows 49 Medicare services from Dr. Walker across 3 procedure codes in 2024, for 67 Medicare patients. Medicare paid $2,347 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 67 Medicare patients who saw Dr. Walker in 2026. The largest group is 65 to 74, with 30 patients. 75% of them have high blood pressure, and 67% have high cholesterol. Their average risk score is 1.67, 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 72, with 51% women.

In 2026, Dr. Walker wrote 38 Medicare Part D claims for 24 patients. 95% of them were for generic drugs. CMS names the drug for 15 of them, across 1 drug with 11 or more claims each, at $26 in total drug cost. In 2020, CMS named 13 claims across 1 drug.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 79 out of 100 for Dr. Walker for performance year 2026, reported as part of a group. Dr. Walker accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)

Hernia repair - groin (open): 1 to 10 procedures (CMS shows small counts as a range)

Melanoma (skin cancer) excision: 1 to 10 procedures (CMS shows small counts as a range)

Upper gastrointestinal (GI) endoscopy for acid reflux: 1 to 10 procedures (CMS shows small counts as a range)

Dmand AI links 7 papers to Dr. Walker, published from 2019 to 2024. 2022 was the busiest year, with 2. Dr. Walker has published most often in Trauma Surg Acute Care Open. Dr. Walker's most frequent co-authors are Taylor Price Williams, MD, Samuel Cass and Mitchell Wayne Cox, MD.

CMS Open Payments shows 48 general payments to Dr. Walker from 15 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 76% of the total. Intuitive Surgical, Inc. paid the most, $1,575.

Dr. Walker graduated from UTMB Health in 1981.

Dr. Walker is in network with 20 carriers, including Elevance, United Healthcare and Blue Cross Blue Shield of Michigan. HMO plans come from the most carriers, 11. Check the plan with the practice before a visit.