To make an appointment, call 314-747-2066.
Pediatric appointments, call 314-454-6173.
WashU Medicine 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 WashU Medicine gastrointestinal, transplant and colorectal surgeons to offer a full-range of treatment:
- Gastrointestinal cancer – Fax: 314-454-8103
- General gastroenterology – Fax: 314-747-5871
- Inflammatory bowel disease (IBD) – Fax: 314-362-2357
- Interventional endoscopy – Fax: 314-747-1277
- Liver disease (hepatology) – Fax: 314-454-5108
- Neurogastroenterology

Lolwa Al-Obaid, MD
Liver Health (Hepatology)
Locations:
Center for Advanced Medicine Gastrointestinal Center

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
Barnes-Jewish Hospital
Barnes-Jewish West County Hospital
Missouri Baptist Medical Center

Michael C. Bennett, MD
Gastroenterology
Nonsurgical Weight Loss
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
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