Dr. Marcos Santiago Hernandez, MD

With 20 years of practice, Dr. Marcos Santiago Hernandez is an established internal medicine provider, MD, after earning their medical degree at Other in 1982. Dr. currently practices at Hospital Oncologico Dr Isaac Gonzalez Martinez in San Juan, Puerto Rico. Their National Provider Identifier (NPI) is 1619080389, 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.

Dr. Marcos Santiago Hernandez's practice is located in ZIP 00910 (San Juan, Puerto Rico), which has an overall CartoChrome Healthcare Access Score of 28/100 (Limited Access). Access constraints in this ZIP code can affect wait times, specialist availability, and emergency response — context worth knowing when choosing a provider.

CMS Medicare data shows Dr. Marcos Santiago Hernandez as a lower-volume internal medicine provider, treating approximately 80 Medicare beneficiaries and delivering 331 services in the most recent reporting year. That panel size indicates a smaller, more selective practice pattern.