Chelsie McCarthy, FNP appears in the CMS NPPES registry as a Registered Nurse provider holding FNP credentials at 321 MAIN ST, Acton, MA, 01720, with a listed phone of (978) 635-8700. NPI 1629419536 was issued on 07/09/2013. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what McCarthy 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 1,349 prescription claims written by this provider, covering 403 Medicare beneficiaries and totaling roughly $221K in drug spend, split 17% brand-name and 81% generic by claim count. 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 87.1/100 for the 2023 performance year (Quality 87, Cost 70.7), compared with the national average of 83.1.

Registered Nurse is a high-volume specialty nationwide, with 175,652 enrolled providers across 56 states and an average of 1,000 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.