To make an appointment, call 314-747-2066.
Pediatric appointments, call 314-454-6173.
Washington University gastroenterology (GI) specialists have expertise in a comprehensive range of GI diseases of the upper tract—like the esophagus, stomach and small intestines (duodenum); the lower GI tract—like the large intestine, colon and rectum; and the hepatobiliary system—such as the liver, gall bladder, biliary tract and pancreas.
Our specialists work closely with Washington University gastrointestinal, transplant and colorectal surgeons to offer a full-range of treatment:
- Gastrointestinal cancer
- General gastroenterology
- Inflammatory bowel disease (IBD)
- Interventional endoscopy
- Liver disease (hepatology)
- Neurogastroenterology

Osama Altayar, MD
Gastroenterology
Locations:
Center for Advanced Medicine Gastrointestinal Center
Barnes-Jewish West County Hospital – Medical Office Building 4

Surachai Amornsawadwattana, MD
Gastroenterology
Locations:
Center for Advanced Medicine Gastrointestinal Center

Riad Raymond Azar, MD
Gastroenterology
Locations:
Center for Advanced Medicine Endoscopy Center
Barnes-Jewish West County Hospital – Medical Office Building 2

Ahmad N. Bazarbashi, MD
Gastroenterology
Interventional Endoscopy
Locations:
Center for Advanced Medicine – South County

Michael C. Bennett, MD
Gastroenterology
Weight Loss
Locations:
Barnes-Jewish West County Hospital – Medical Office Building 4
Center for Advanced Medicine – South County

Christopher Berghoff, PhD
Gastroenterology
Locations:
Center for Advanced Medicine
Barnes-Jewish West County Hospital
Missouri Baptist Medical Center
Center for Advanced Medicine – South County

Elizabeth J. Blaney, MD
Gastroenterology
Locations:
Center for Advanced Medicine Gastrointestinal Center
Barnes-Jewish West County Hospital – Medical Office Building 1

Jeffrey W. Brown, MD, PhD
Gastroenterology
Locations:
Barnes-Jewish Hospital
Barnes-Jewish West County Hospital