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

Guillermo Alfredo Mendoza Fonseca, MD

Individual provider Internal Medicine Physician · NPI 1285898288

Guillermo Alfredo Mendoza Fonseca, MD is an Internal Medicine in Oviedo, Florida. Qualified in 2001, 25 years ago. Practices with Ability Health Services, Inc, a 1,232-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Florida and Rhode Island.

Years since qualifying
25
Licensed in
FL, RI
In the registry since
2008
Specialties on file
3
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

2572 W State Road 426 Ste 3040
Oviedo, FL 32765-8389
Phone: (407) 890-9748
Fax: (407) 890-9819
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

General Practice Physician (primary) Taxonomy 208D00000X · Licence ME117112 (FL)
Internal Medicine Physician Taxonomy 207R00000X · Licence ME117112 (FL)
Internal Medicine Physician Taxonomy 207R00000X · Licence MD12761 (RI)

Record details

NPI number1285898288
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 18, 2008
Last updated in NPPESMarch 7, 2023

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2001 (25 years in practice)
Group practice Ability Health Services, Inc — 1232 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

Other providers in Oviedo