Dr. Robert Knowles, MD

Dr. Knowles practices at Carilion New River Valley Medical Center in Christiansburg, Virginia, part of Carilion Clinic.

Dr. Knowles' NPI, 1013915602, was assigned on July 8, 2005. Dr. Knowles holds Virginia license 0101058403.

Dr. Knowles' primary practice is Carilion New River Valley Medical Center, at 2900 Lamb Circle, Christiansburg, VA 24073 in Montgomery County. The practice phone is (540) 731-2000.

Dr. Knowles' primary practice is Carilion New River Valley Medical Center in Christiansburg, Virginia, part of Carilion Clinic. Dr. Knowles is also affiliated with Carilion Roanoke Memorial Hospital. The medical group on file is Carilion Clinic. Dmand AI also links Dr. Knowles to 5 more home health agencies and 5 medical groups, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Knowles practices, 7 sites in all. Vendor and product names are available with a free account.

Surgery is Dr. Knowles' primary specialty in the NPI Registry, under taxonomy code 208600000X. Dmand AI has Dr. Knowles' licenses on file in 2 states: Virginia and New Hampshire.

CMS data shows 849 Medicare services from Dr. Knowles across 9 procedure codes in 2024, for 296 Medicare patients. Medicare paid $44,229 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 296 Medicare patients who saw Dr. Knowles in 2026. The largest group is 75 to 84, with 108 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 13% are also on Medicaid. Their average risk score is 2.57, 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. Knowles' median patient age at 72, with 51% women.

In 2026, Dr. Knowles wrote 43 Medicare Part D claims for 34 patients. 95% of them were for generic drugs. They cover 3 drugs, with $759 in total drug cost. In 2022, CMS named 17 claims across 1 drug.

Dr. Knowles accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 34 procedures of removal of tissue by Dr. Knowles, more than 75% of the clinicians it reports for that procedure.

Removal of skin lesions: 1 to 10 procedures (CMS shows small counts as a range)

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

CMS Open Payments shows 103 general payments to Dr. Knowles from 25 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 58% of the total. KCI USA, Inc. paid the most, $1,455.