DENNIS TAN, NP-C appears in the CMS NPPES registry as a Medical-Surgical Registered Nurse provider holding NP-C credentials at 300 MOUNT AUBURN ST STE 517, CAMBRIDGE, MA, 02138, with a listed phone of (617) 492-3500. NPI 1255903696 was issued on 07/14/2021. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what TAN 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 294 prescription claims written by this provider, covering 60 Medicare beneficiaries and totaling roughly $13K in drug spend, with an opioid prescribing rate of 26.9%. 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.

Medical-Surgical Registered Nurse is a narrow specialty nationwide, with 3,523 enrolled providers across 54 states and an average of 798 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.