Dr. Marissa Ambron, D.O.

With 18 years of practice, Dr. Marissa Ambron is an established internal medicine provider, D.O., after earning their medical degree at Philadelphia College Of Osteopathic Medicine in 2008. Dr. currently practices across 7 facilities, including Upmc Williamsport in Williamsport, Pennsylvania. Their National Provider Identifier (NPI) is 1518113570, and the profile below combines data from CMS NPPES, Medicare billing records, the HHS OIG exclusion list, and — where available — CMS Open Payments, Medicare Utilization, and Part D prescriber summaries.

CMS Medicare data shows Dr. Marissa Ambron as a lower-volume internal medicine provider, treating approximately 215 Medicare beneficiaries and delivering 463 services in the most recent reporting year. That panel size indicates a smaller, more selective practice pattern.

Under the Physician Payments Sunshine Act, CMS reports that Dr. Marissa Ambron received $371 in industry payments in 2023. Payments at this scale are typical for most practicing physicians and generally reflect routine educational activities.