Dr. Melissa Ray Isbell, MD

Dr. Isbell practices at Renal Associates, P.A. in San Antonio, Texas.

Dr. Isbell's NPI, 1881660660, was assigned on February 23, 2006. Dr. Isbell graduated from UTMB Health in 1990. Dr. Isbell holds Texas license H9526.

Dr. Isbell's primary practice is Renal Associates, P.A., at 4458 Medical Dr, San Antonio, TX 78229 in Bexar County. The practice phone is (210) 614-1231.

Dr. Isbell's primary practice is Renal Associates, P.A. in San Antonio, Texas. Dr. Isbell is also affiliated with Methodist Hospital. The medical group on file is Renal Associates. Dmand AI also links Dr. Isbell to 2 more hospitals, 1 dialysis center and 1 group practice or clinic, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Isbell practices, 5 sites in all. Vendor and product names are available with a free account.

Nephrology is Dr. Isbell's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Isbell is board certified in internal medicine by the American Board of Internal Medicine. Dr. Isbell is licensed in Texas.

Dmand AI lists acute kidney failure, chronic kidney disease, kidney disease and parathyroid gland disorder among the conditions Dr. Isbell treats.

CMS data shows 5,032 Medicare services from Dr. Isbell across 22 procedure codes in 2024, for 510 Medicare patients. Medicare paid $212,068 for them.

CMS counts 510 Medicare patients who saw Dr. Isbell in 2024. The largest group is 65 to 74, with 171 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 18% are also on Medicaid. Their average risk score is 3.90, 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. Isbell's median patient age at 65, with 53% women.

In 2024, Dr. Isbell wrote 4,930 Medicare Part D claims for 485 patients. 81% of them were for generic drugs. CMS names the drug for 4,378 of them, across 98 drugs with 11 or more claims each, at $1,576,796 in total drug cost. In 2023, CMS named 4,415 claims across 89 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 75 out of 100 for Dr. Isbell for performance year 2024, reported as part of a group. Dr. Isbell accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Isbell as offering telehealth.

CMS Open Payments shows 581 general payments to Dr. Isbell from 52 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 97% of the total. AstraZeneca Pharmaceuticals LP paid the most, $2,256.

Dmand AI lists 3 awards for Dr. Isbell, most recently CMS Stage 1 EHR in 2013.

Dr. Isbell graduated from UTMB Health in 1990. Dr. Isbell is a member of ACP.

Dr. Isbell is in network with 22 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. HMO plans come from the most carriers, 13. Check the plan with the practice before a visit.