IRINA BROWN, MD appears in the CMS NPPES registry as a Driver provider holding MD credentials at 18101 PRINCE PHILIP DR, OLNEY, MD, 20832, with a listed phone of (203) 535-8550. NPI 1427217157 was issued on 06/06/2008. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what BROWN 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 prescribing data is not currently published for this NPI, which typically means the provider either wrote fewer than 11 Part D claims in the most recent reporting year, does not participate in Medicare, or practices in a specialty that rarely prescribes outpatient drugs. Absence of prescribing data is not a quality signal — many Driver providers operate outside Part D entirely. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 80.1797/100 for the 2023 performance year (Quality 76.6904, Cost 53.4937), compared with the national average of 83.1.

Driver is a mid-sized specialty nationwide, with 8,284 enrolled providers across 52 states and an average of 7,207 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.