MARC DUKE, AGCNS-BC appears in the CMS NPPES registry as a Clinical Nurse Specialist provider holding AGCNS-BC credentials at 1201 W 38TH ST, AUSTIN, TX, 78705, with a listed phone of (512) 324-1000. NPI 1659943322 was issued on 07/13/2021. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what DUKE 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 47 prescription claims written by this provider, covering N/A Medicare beneficiaries and totaling roughly $4K in drug spend, split 23% brand-name and 77% 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.

Clinical Nurse Specialist is a narrow specialty nationwide, with 1,708 enrolled providers across 49 states and an average of 953 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.