JOSHUA KELLER, M.D. appears in the CMS NPPES registry as a Rheumatology Physician provider holding M.D. credentials at 51 SEWALL ST, PORTLAND, ME, 04102, with a listed phone of (207) 774-5761. NPI 1578975439 was issued on 05/27/2014. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what KELLER 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 1,603 prescription claims written by this provider, covering 350 Medicare beneficiaries and totaling roughly $1.2 million in drug spend, with an opioid prescribing rate of 2.6%. 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 98.0699/100 for the 2023 performance year (Quality 86.1398), compared with the national average of 83.1.

Rheumatology Physician is a mid-sized specialty nationwide, with 6,181 enrolled providers across 52 states and an average of 2,054 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.