STEPHANIE MARSHALL, DO appears in the CMS NPPES registry as a Interventional Cardiology Physician provider holding DO credentials at 8684 CONNECTICUT ST STE A, MERRILLVILLE, IN, 46410, with a listed phone of (192) 472-8990. NPI 1124002738 was issued on 12/06/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what MARSHALL 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 4,688 prescription claims written by this provider, covering 428 Medicare beneficiaries and totaling roughly $693K in drug spend, split 12% brand-name and 88% generic by claim count, with an opioid prescribing rate of 0.4%. 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 99.6644/100 for the 2023 performance year (Quality 82.3139), compared with the national average of 83.1.

Interventional Cardiology Physician is a narrow specialty nationwide, with 3,382 enrolled providers across 53 states and an average of 2,984 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.