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Dr. Guillermo Fonseca, MD

Dr. Guillermo Fonseca, MD

Internal Medicine*
20+ years of experience

Dr. Guillermo Fonseca, MD is an internist in Oviedo, FL and has over 20 years of experience in the medical field. He graduated from Pontificia Universidad Javeriana, Facultad De Medicina in 2001. He is affiliated with AdventHealth Orlando. He is accepting new patients.

5 Star Rating
Based on 14 reviews 5 Star Rating (14 reviews)

Practice

2572 W State Road 426 Ste 3040 Oviedo, FL 32765
(407) 890-9748

At a Glance

  • Explains Conditions Well
    Patients said this doctor explains conditions well. • See reviews
  • Practices at Top Hospital
    America’s 50 Best Hospitals for Surgical Excellence Award™ • See hospitals
  • Hospital Satisfaction
    Patients said they were highly satisfied at this doctor's hospital. • See hospitals
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Dr. Fonseca's Reviews

Likelihood to recommend Dr. Fonseca

5.0

14 ratings, 7 with a written review
5 Star
100%
100%
4 Star
0%
0%
3 Star
0%
0%
2 Star
0%
0%
1 Star
0%
0%

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RecentHighestLowestMost Helpful
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Oviedo – Dec 10, 2024
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What went well
  • Listened & answered questions
  • Explained conditions well
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Orlando , FL – Sep 26, 2018
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What went well
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
2 people found this helpful
Helpful
Roxanne hernandez in apopka – May 25, 2018
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What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
3 people found this helpful
Helpful
Ginger Harbin in Newark, NJ – Nov 29, 2017
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What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
2 people found this helpful
Helpful
Roy Simmons in Orlando, FL – Oct 06, 2017
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What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
3 people found this helpful
Helpful
Angelica Duarte in Miami, FL – Jun 25, 2016
×Post a ResponseAre you Dr. Guillermo Fonseca, MD?
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
9 people found this helpful
Helpful
Brian in Ocoee, FL – Jan 03, 2016
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Leave a review

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Know Before You Go

About Me

biography

Dr. Guillermo Fonseca, MD is an internist in Oviedo, FL and has over 20 years of experience in the medical field. He graduated from Pontificia Universidad Javeriana, Facultad De Medicina in 2001. He is affiliated with AdventHealth Orlando. He is accepting new patients.

  • Internal Medicine

*Healthgrades does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.

  • Metrowest Medical Center

    Internship Hospital

  • Pontificia Universidad Javeriana, Facultad De Medicina

    Medical School, 2001
For detailed information about any of the below board actions, please search for the provider's records on the linked state licensing board or the Federation of State Medical Boards. To learn more about the difference between these sources, please refer to our FAQs.
Healthgrades has not received any data indicating a board action exists for this provider.

Healthgrades receives board action history for physicians and physician assistants. The information displayed here is sourced from independent information providers, such as state board websites, and may not be the most up-to-date information. Healthgrades makes no representations with respect to the accuracy of any information provided here and assumes no responsibility or liability for such information.

Learn more about medical license public record check

  • English

  • Portuguese

Focus on Diabetes

Locations

Practice

Dr Guillermo Mendoza Int Med-Llc2572 W State Road 426 Ste 3040 Oviedo, FL 32765
1

Affiliated Hospitals

  • AdventHealth Orlando

    601 E Rollins St
    Orlando, FL 32803
    Recipient of 91
    hospital awards

    America’s 50 Best Hospitals for Surgical Excellence Award™ (2025, 2024, 2023)

    Top 1% in the nation for providing the highest clinical quality year over year

    America's 100 Best Hospitals Award™ (2025, 2024, 2023)

    Top 1% in the nation for providing the highest clinical quality year over year

    View all awards

    How patients felt about the care they received at this hospital.

    85%
    Patients said they were given information about recovering at home

    1% higher than the national average

    76%
    Patients said that nurses always listened to them and explained things well

    1% higher than the national average

    View all patient feedback
Learn more about how Healthgrades measures Hospital Quality