John J. Alvarez, M.D.



520 E Euclid Ave

San Antonio, TX 78212

Closed. Opens Thur at 8 AM

Quick Facts

  • Virtual Telemedicine Visits Available, Call For Details
  • Board Certified Gastroenterologist
  • Currently Accepting New Patients
  • Most Insurance Plans Accepted
  • Performs Colonoscopies

SAGA - San Antonio, TX - Downtown

Gastroenterology in San Antonio, TX

SAGA - San Antonio, TX - Downtown

520 E Euclid Ave

San Antonio, TX 78212

Closed. Opens Thur at 8 AM


SAGA - San Antonio, TX - Medical Center

Gastroenterology in San Antonio, TX

SAGA - San Antonio, TX - Medical Center

2833 Babcock Rd

Ste 100

San Antonio, TX 78229

Closed. Opens Thur at 8 AM

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About John J. Alvarez, M.D.


He began his journey into medicine while pursuing his undergraduate degree. He had the opportunity to shadow internists at Thomason Hospital in El Paso, TX, and he was amazed by their ability to diagnose and treat complex diseases. After that experience, he felt there was no other career path that would be more satisfying than that of a physician. He chose gastroenterology because it requires a strong background in Internal Medicine as well as a surgical understanding of the human body.

Dr. Alvarez graduated from Trinity University with a Bachelor of Science degree in Business Administration, followed by a Master’s degree in Public Health from the UT Houston School of Public Health. He next attended medical school at the UT Health Science Center at San Antonio School of Medicine, where he also completed his internship and residency in Internal Medicine.

Dr. Alvarez received specialty training at Baylor Scott & White, and he worked with an innovator and specialist in the field of endoscopic ultrasound and endoscopic retrograde cholangiopancreatography (ERCP). That training has helped him to establish himself as a gastroenterologist in San Antonio.

Although all aspects of gastrointestinal disease fascinate Dr. Alvarez, he is especially interested in pancreatic and biliary diseases. Because of his specialized training, Dr. Alvarez has the advantage of diagnosing and treating a wide range of pancreatic and biliary diseases. Endoscopic ultrasound is a great tool that allows him to view, evaluate, and biopsy organs and benign or malignant tumors, both within and outside of the gastrointestinal tract. The use of endoscopic ultrasound in combination with ERCP has decreased the need for ERCP as a diagnostic tool over time, thus minimizing the associated risk of performing this particular procedure.

When he’s not working, Dr. Alvarez enjoys many different types of exercise, including weight lifting, golf, basketball, tennis, snowboarding, and riding his mountain bike. He also likes to listen to live music.


Bachelor of Science in Business Administration, Trinity University, San Antonio, TX
Master of Public Health, University of Texas Houston School of Public Health, Houston, TX
Doctor of Medicine, University of Texas Health Science Center at San Antonio School of Medicine San Antonio, TX
Internship, Residency in Internal Medicine, University of Texas Health Science Center, San Antonio, Texas
Fellowship, Gastroenterology Baylor Scott and White Health Central Texas, Killeen, TX


Officer and member, Gastrointestinal Interest Group (2011-2012)
Vice President, Latino Medical Student Association(2009)
Member, American Medical Association
Member, American College of Gastroenterology
Member, American Society of Gastrointestinal Endoscopy


Always seen in a timely manner & Dr. Alvarez always has time and doesn’t rush through my appointment

D.D. Google

Had a great visit with the doctor. Office staff very cordial and I didn’t have to wait long.

G.W. Google

De Alavez is very patient and attentive to listening to the medical condition I’m going through, very professional along with his team , I recommended with 5 starts

L.A. Google

Dr Alvarez is awesome. I’ve been his patient since 2019. He also had visited me at St Luke’s even prior to 2019. He’s observed all the progress I’ve made. He is really concerned regarding my GI health issues since I’ve had as (pediatric) a baby. He’s more than an awesome Gastro physician. I consider him a friend. 💙

R.K. Google

Great and comfortable experience. No complaints.

S.V. Google


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