DAVID HAHN, MD appears in the CMS NPPES registry as a Neurology Physician provider holding MD credentials at 115 MASON ST STE 1, GREENWICH, CT, 06830, with a listed phone of (203) 276-4464. NPI 1053625459 was issued on 07/28/2010. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what HAHN 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 30 prescription claims written by this provider, covering N/A Medicare beneficiaries and totaling roughly $880 in drug spend. 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 94.2464/100 for the 2023 performance year (Quality 78.2615), compared with the national average of 83.1.

Neurology Physician is a mid-sized specialty nationwide, with 19,866 enrolled providers across 54 states and an average of 1,309 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.