November 16, 2023 Michelle Schmanski

GI Doctors in San Antonio

When it comes to gastrointestinal health, finding the right doctor can make all the difference. Whether you require routine preventive care such as a screening colonoscopy or are dealing with a gastrointestinal condition, the choice of GI doctors in San Antonio matters.

At Gastroenterology Consultants of San Antonio, we have a diverse team of 29 dedicated physicians. While they are experts in all things gastroenterology and hepatology, our doctors each have specialized areas they focus on. Find the GI doctors in San Antonio and the surrounding areas that will meet your needs – from chronic digestive problems to liver disease or preventive colonoscopy; they are here to help!

• Dr. Muhammad Ali, MD, MS
  • Locations: Westover Hills, Castroville
  • Specialties: Colon cancer screening, GERD, constipation, IBS, Crohn’s disease, ulcerative colitis, and liver disease, including care for patients with Hepatitis B & C and fatty liver​.
• Dr. Hays L. Arnold, MD
  • Location: Northeast
  • Specialties: Inflammatory bowel diseases like Crohn’s and ulcerative colitis; GERD​.
• Dr. Balaji K. Ayyar, MD
  • Locations: Hardy Oak, Stone Oak, Bulverde
  • Specialties: GERD/acid reflux, Barrett’s esophagus, swallowing issues, and eosinophilic esophagitis​.
• Dr. Jeff Bullock, MD
  • Locations: Boerne, Medical Center
  • Specialties: Crohn’s, ulcerative colitis, and other gastrointestinal conditions.
• Dr. Jorge M. Cavazos, MD
  • Locations: Medical Center, Mission Trail, Alamo Heights
  • Specialties: Liver disease, including hepatitis and cirrhosis; colon cancer screening; inflammatory bowel disease​​.
• Dr. Abhishek Challa, MD
  • Locations: Westover Hills, Castroville
  • Specialties: Colon cancer screening, capsule endoscopy, GERD, Barrett’s esophagus, constipation, IBS, and liver diseases, including cirrhosis, alcoholic liver disease, hepatitis C, and fatty liver disease​.
• Dr. J. Ryan Cunningham, MD
  • Locations: Boerne, Medical Center
  • Specialties: Esophageal diseases, GERD including advanced testing and treatment with the Stretta procedure, upper and lower endoscopy, IBD (Crohn’s disease and Ulcerative colitis), colorectal cancer screening, and small bowel capsule endoscopy​.
• Dr. Sunil K. Dwivedi, MD
  • Location: Medical Center
  • Specialties: All areas of gastroenterology with a special interest in liver diseases​.
• Dr. Alfredo Espinoza, MD
  • Location: Medical Center
  • Specialties: General gastrointestinal care, colon cancer screening, end-stage liver disease, general and advanced endoscopic procedures, including upper endoscopy, colonoscopy, and ERCP (Endoscopic Retrograde Cholangiopancreatography)​.
• Dr. Mario Garza, MD
  • Locations: Hardy Oak, Stone Oak
  • Specialties: Special interest in colon cancer screening and GERD.
• Dr. Michael J. Guirl, MD
  • Locations: Hardy Oak, Stone Oak
  • Specialties: Screening colonoscopy, inflammatory bowel disease, hepatology (liver disease), therapeutic and capsule endoscopy​.
• Dr. Stephen A. Harrison, MD
  • Location: Northeast
  • Specialties: Board-certified in both Internal Medicine and Gastroenterology with a focus on advanced liver disease, hepatitis C, and non-alcoholic fatty liver disease (NAFLD)​.
• Dr. James F. Jackson, MD
  • Locations: Hardy Oak, Stone Oak, Boerne
  • Specialties: General gastroenterology and hepatology, therapeutic endoscopy, capsule endoscopy, ERCP, Crohn’s Disease, and ulcerative colitis​​.
• Dr. David Pryor Jones, DO
  • Location: Northeast
  • Specialties: General gastroenterology with a focus on patient-centered education and care​​.
• Dr. Sajneet K. Khangura, MD
  • Locations: Westover Hills, Castroville, Alamo Heights
  • Specialties: Endoscopic therapies, complex polypectomies, Barrett’s ablative therapy, endoscopic ultrasound, colon cancer prevention screening, GERD, and inflammatory bowel diseases​.
• Dr. Jaehyun Kim, MD
  • Locations: Connally Oaks, Northeast
  • Specialties: Colon cancer screening, GERD, and inflammatory bowel disease, including ulcerative colitis and Crohn’s disease​.
• Dr. Donna McMyler, MD
  • Locations: Hardy Oak, Stone Oak
  • Specialties: Nutrition, acid reflux / GERD, celiac disease, IBS, gastroparesis, and screening for colon cancer​.
• Dr. Paresh P. Mehta, MD
  • Locations: Hardy Oak, Stone Oak
  • Specialties: Inflammatory bowel diseases, including Crohn’s disease and ulcerative colitis; liver diseases, including Hepatitis C and fatty liver disease; colonoscopy.
• Dr. Jadesola Omoyeni, MD
  • Locations: Connally Oaks, Northeast
  • Specialties: Gastroenterology and hepatology with a particular interest in preventive medicine such as colon cancer prevention.
• Dr. Chirag Patel, MD
  • Locations: Medical Center, Mission Trail
  • Specialties: Gastroenterology, managing digestive health issues.
• Dr. Harsh Patel, MD
  • Locations: Medical Center, Boerne, Bandera
  • Specialties: Colon cancer screening, GERD (acid reflux), inflammatory bowel disease (Ulcerative colitis, Crohn’s disease), and liver diseases including Hepatitis C and Fatty liver disease​.
• Dr. Michael Piesman, MD
  • Location: Northeast
  • Specialties: Therapeutic endoscopy, particularly for biliary, pancreatic, and esophageal disorders​​.
• Dr. Alejandro Pruitt, MD
  • Location: Medical Center
  • Specialties: Esophageal, pancreatic, and biliary diseases, advanced therapeutic endoscopy, radiofrequency ablation of Barrett’s esophagus, complex biliary and pancreatic endoscopy, radial and linear endoscopic ultrasound (EUS), EUS guided radiofrequency ablation of pancreatic neuroendocrine tumors​​.
• Dr. Oscar G. Ramirez, MD
  • Location: Northeast
  • Specialties: General gastroenterology, with a focus on helping patients understand their GI symptoms and conditions and addressing their digestive issues.
• Dr. Habeeb Salameh, MD
  • Locations: Hardy Oak, Stone Oak, Alamo Heights
  • Specialties: Therapeutic endoscopy, biliary, pancreatic, and esophageal disorders, postsurgical gastrointestinal leaks and fistulas management, Barrett’s esophagus radiofrequency ablation and cryoablation, diagnostic endoscopic ultrasound (EUS) with fine-needle aspiration (FNA) and endoscopic retrograde cholangiopancreatography (ERCP).
• Dr. Richard T. Shaffer, MD
  • Locations: Hardy Oak, Stone Oak
  • Specialties: General gastroenterology
• Dr. Zarema Singson, MD
  • Location: Medical Center
  • Specialties: Inflammatory bowel disease, colon cancer prevention, women’s GI health, hepatology (liver disease), and obesity as it relates to GI disorders​​.
• Dr. Darren Spearman, MD
  • Location: Northeast
  • Specialties: Colon cancer screening, preventive medicine, and Inflammatory Bowel Disease (IB
• Dr. Gregg Wendorf, MD
  • Location: Medical Center
  • Specialties: Functional bowel disorders such as IBS, motility disorders such as gastroparesis, and liver diseases including Hepatitis C, fatty liver, and cirrhosis.

If you’ve been suffering from long-term digestive issues, liver problems, or simply want to maintain your digestive health, it’s time to begin a lasting partnership with the best GI doctor for you. Schedule an appointment with one of our compassionate gastroenterologists today!

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