Dr. Samuel Gray Walker, DO

Dr. Walker practices at The University of Tennessee Medical Center in Knoxville, Tennessee, part of Ut Medical.

Dr. Walker's NPI, 1144727579, was assigned on April 11, 2018. Dr. Walker holds Tennessee license 4139.

Dr. Walker's primary practice is The University of Tennessee Medical Center, at 1924 Alcoa Highway, Knoxville, TN 37920 in Knox County. The practice phone is (865) 305-9000.

Dr. Walker's primary practice is The University of Tennessee Medical Center in Knoxville, Tennessee, part of Ut Medical. The medical group on file is UT Internal Medicine - Pellissippi.

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

Hospitalist is Dr. Walker's primary specialty in the NPI Registry, under taxonomy code 208M00000X. Dr. Walker is board certified in internal medicine by the American Board of Internal Medicine. Dr. Walker is licensed in Tennessee.

CMS data shows 475 Medicare services from Dr. Walker across 5 procedure codes in 2024, for 158 Medicare patients. Medicare paid $39,391 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 158 Medicare patients who saw Dr. Walker in 2024. The largest group is 65 to 74, with 68 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 23% are also on Medicaid. Their average risk score is 2.52, 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 50% women.

In 2024, Dr. Walker wrote 391 Medicare Part D claims for 151 patients. 87% of them were for generic drugs. CMS names the drug for 181 of them, across 12 drugs with 11 or more claims each, at $20,473 in total drug cost. In 2023, CMS named 148 claims across 9 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 96 out of 100 for Dr. Walker for performance year 2024, reported through an alternative payment model (APM). Dr. Walker accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

CMS Open Payments shows 37 general payments to Dr. Walker from 14 drug and device companies from 2020 to 2025. Food and beverage make up the largest share, 100% of the total. ZOLL Services LLC (A/K/A ZOLL LifeCor Corp) paid the most, $139.