Dr. Alexandra Guillaume, MD

With 18 years of practice, Dr. Alexandra Guillaume is an established gastroenterology provider, MD, after earning their medical degree at Tufts University School Of Medicine in 2006. Dr. currently practices at Square Care Medical Group Llp in East Setauket, New York. Their National Provider Identifier (NPI) is 1396981197, 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. Alexandra Guillaume as a lower-volume gastroenterology provider, treating approximately 482 Medicare beneficiaries and delivering 900 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. Alexandra Guillaume received $1K in industry payments in 2023. Payments at this scale are typical for most practicing physicians and generally reflect routine educational activities.