Verified Reviews
You can trust
You can trust
Guillermo Madero, M.D.
Gonzaba Medical Group
Internal Medicine: Geriatrics
San Antonio, TX
4.9
1129 Ratings
477 Comments
Dr. Guillermo Madero graduated from the University of Monterrey Mexico, where he received his medical degree. After living in Mexico for 25 years, and with only two pieces of luggage, Dr. Madero moved to New York City for his residency and fellowship at Staten Island University Hospital. Dr. Madero started with Gonzaba Medical Group in 2021.
4.9
1129 Ratings
477 Comments
Dr. Guillermo Madero graduated from the University of Monterrey Mexico, where he received his medical degree. After living in Mexico for 25 years, and with only two pieces of luggage, Dr. Madero moved to New York City for his residency and fellowship at Staten Island University Hospital. Dr. Madero started with Gonzaba Medical Group in 2021.
The reviews listed below were collected independently of Gonzaba Medical Group through rater8. Each review represents an authentic and verified patient experience.
Read More
Born and raised in Monterrey, Mexico, Dr. Guillermo Madero graduated from the University of Monterrey Mexico, where he received his medical degree. After living in Mexico for 25 years, and with only two pieces of luggage, Dr. Madero moved to New York City for his residency and fellowship at Staten Island University Hospital. In 2015 Dr. Madero and his wife moved to San Antonio, Texas to start a family and to be closer to home.
Growing up in a Catholic family an educational priest invited Dr. Madero to attend a seminar to consider becoming a priest. Though he did not ultimately become a priest, what Dr. Madero learned, was that through the philosophy of “men in the service of mankind” was that by becoming a doctor, he could serve others helping them achieve a better lifestyle and healthier outcomes. He also learned about the Virgin de Guadalupe, encouraging him to reach out to his faith for guidance. Having a “Guadalupe” Clinic at GMG was a beautiful symbol for Dr. Madero.
Dr. Guillermo Madero, M.D. started with Gonzaba Medical Group in 2021. He loves that GMG caters to seniors and to the geriatric community, treating each patient Como Familia, Like Family. It is important to him that GMG is physician-led and focuses on the outcomes of patients.
In Dr. Madero’s free time he enjoys spending time with his wife and two small children, running, and hiking. You may catch him reading a Stephen King or Michael Crichton novel, playing backgammon, dominos, grilling some carnitas asadas, and watching his favorite soccer team, Rayados of Monterrey.
© 2025 All Rights Reserved. rater8.
Te best
Very professional and to the point there was practically no waiting got there got me in got me out.
Excellent doctor and very caring for the patient and improve health is his goal.
Such a pleasant visit. Dr.Madero is ALWAYS attentive, professional and very understanding. I never feel rushed.
Muy Buen Doctor, dedicado en su profecion.
Has never made me feel rushed and explains things to me.
Toma tiempo para escucharme, hace review my lab results and explain every result.
I recently turned 65 years old and moved into Medicare after being with the military medical system for 43 years. This was my first visit for Medical care under with Fr. Madero and Gonzaba Med Group. Dr. Madero was very thorough going over my medical history and medications.
Dr Madero is always professional and answers many of my questions.
Very concern when explain to him how I'm feeling . Actually listens what have to say. Very respectful. Very satisfied with the office and Dr experience