Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Mr. Guillermo Marrero, MD

Individual provider Internal Medicine Physician · NPI 1245211044

Mr. Guillermo Marrero, MD is an Internal Medicine in Oviedo, Florida. Qualified in 1993, 33 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in Florida.

Years since qualifying
33
Licensed in
FL
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1000 Executive Dr Ste 1
Oviedo, FL 32765-8140
Phone: (407) 971-1970
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence ME0074991 (FL)

Record details

NPI number1245211044
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedNovember 9, 2005
Last updated in NPPESSeptember 22, 2010

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1993 (33 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Oviedo