Grayson Sumner, DO appears in the CMS NPPES registry as a Family Medicine Physician provider holding DO credentials at 110 HIGHWAY 246 N, Greenwood, SC, 29649, with a listed phone of (864) 725-1750. NPI 1437508967 was issued on 06/06/2016. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Sumner most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 9,500 prescription claims written by this provider, covering 650 Medicare beneficiaries and totaling roughly $951K in drug spend, split 11% brand-name and 89% generic by claim count, with an opioid prescribing rate of 0.6%. These figures capture only Medicare Part D, commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 96.1/100 for the 2023 performance year (Quality 92.2), compared with the national average of 83.1.

Family Medicine Physician is a high-volume specialty nationwide, with 147,640 enrolled providers across 56 states and an average of 3,418 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.