Dr. Guillermo Pastrana Maisonet, MD

With 15 years of practice, Dr. Guillermo Pastrana Maisonet is an established general practice provider, MD, after earning their medical degree at Other in 2008. Dr. currently practices at Hospital Oncologico Dr Isaac Gonzalez Martinez in San Juan, Puerto Rico. Their National Provider Identifier (NPI) is 1124307814, 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. Guillermo Pastrana Maisonet as a lower-volume general practice provider, treating approximately 12 Medicare beneficiaries and delivering 28 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. Guillermo Pastrana Maisonet received $541 in industry payments in 2023. Payments at this scale are typical for most practicing physicians and generally reflect routine educational activities.