CATHERINE MATHIEU, M.D. appears in the CMS NPPES registry as a Blood Banking & Transfusion Medicine Physician provider holding M.D. credentials at 1840 AMHERST ST, WINCHESTER, VA, 22601, with a listed phone of (540) 536-8790. NPI 1447249057 was issued on 10/17/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what MATHIEU 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 Blood Banking & Transfusion Medicine Physician providers operate outside Part D entirely.

Blood Banking & Transfusion Medicine Physician is a narrow specialty nationwide, with 566 enrolled providers across 46 states and an average of 222 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.