ELLEN BRENNAN, NP appears in the CMS NPPES registry as a Primary Care Nurse Practitioner provider holding NP credentials at 405 SILVERSIDE RD STE 104, WILMINGTON, DE, 19809, with a listed phone of (844) 365-7246. NPI 1821729039 was issued on 06/19/2022. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what BRENNAN 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 3,027 prescription claims written by this provider, covering 693 Medicare beneficiaries and totaling roughly $273K in drug spend, with an opioid prescribing rate of 56.6%. 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 76.7457/100 for the 2023 performance year (Quality 90.309, Cost 95.957), compared with the national average of 83.1.

Primary Care Nurse Practitioner is a mid-sized specialty nationwide, with 10,138 enrolled providers across 54 states and an average of 1,363 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.