HealthCareAtlasUSA

This site republishes official CMS/Medicare Care Compare data. It is not medical advice and does not recommend any specific hospital or treatment — for medical decisions, talk to a doctor.

Doctors / FL

GUILLERMO MARRERO, MD

INTERNAL MEDICINE

Graduated: 1993

NPI: 1245211044

Practice Locations (1)

1000 EXECUTIVE DR, SUITE 1

OVIEDO, FL 327658140

4079711970

Source: CMS National Downloadable File, September 2026.