Gastroenterology

Ernesto Guerra, MD

Medical Director, San Antonio Gastroenterology and Endoscopy Center

Ernesto Guerra Jr., MD, is a gastroenterologist practicing primarily in San Antonio, Texas, with additional locations in Plano, Dallas, and Keller, TX. He specializes in gastroenterology, treating conditions common to the field such as inflammatory bowel disease, gastrointestinal bleeding, and disorders requiring endoscopic intervention, though specific conditions are not detailed in profiles. Dr. Guerra serves adult patients of all ages, with no indication of pediatric or geriatric exclusivity.

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Credentials

Board Certifications

Internal Medicine (ABIM)
Gastroenterology (ABIM)

Education & Training

Medical School: University of California, San Diego (MD, 1976)
Residency: University of Texas Health Science Center San Antonio (Internal Medicine, 1980)
Fellowship: University of Texas Health Science Center San Antonio (Gastroenterology, 1982)

Years in Practice

50+ years

Peer Recognition

ACG — Fellow (FACG)
2026
Castle Connolly — Top Doctor

Clinical Focus

Subspecialties

Colorectal Cancer Screening

Conditions & Treatments

Colon Cancer ScreeningColonoscopyColorectal Cancer

Insurance(s) Accepted

90 Degree BenefitsASR Health Benefits

AetnaAllegiance Health Plans

Ambetter

Please verify your coverage with the provider — plan participation can change.

Practice Details

Hospital Affiliations

Methodist Hospital Metropolitan
Methodist Hospital Specialty and Transplant
Baptist Medical Center

Languages

English, Spanish

Conditions Dr. Guerra treats

Insurance accepted

Frequently asked

Does Dr. Guerra accept 90 Degree Benefits insurance?

Ernesto Guerra's public profile lists 90 Degree Benefits, ASR Health Benefits, and Aetna plus 49 more health plans as accepted plans. Plan participation can change — confirm directly with the practice before your visit.

Where does Dr. Guerra practice?

Ernesto Guerra practices in Plano, TX with hospital affiliations including Methodist Hospital Metropolitan, Methodist Hospital Specialty and Transplant, and Baptist Medical Center.

What does Dr. Guerra specialize in?

Ernesto Guerra is a board-certified gastroenterology specialist with focus areas in Colorectal Cancer Screening.

How long has Dr. Guerra been practicing?

Ernesto Guerra has 50+ years of clinical experience in gastroenterology.

What is Dr. Guerra's medical training?

Public profile training history includes: Medical School: University of California, San Diego (MD, 1976); Residency: University of Texas Health Science Center San Antonio (Internal Medicine, 1980); Fellowship: University of Texas Health Science Center San Antonio (Gastroenterology, 1982).