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:

Brian K. Dieckgraefe

Brian K. Dieckgraefe, MD, PhD

Gastroenterology

Locations:
VA Medical Center: John Cochran Division

Dayna S. Early

Dayna S. Early, MD

Gastroenterology
Interventional Endoscopy
Nonsurgical Weight Loss
Weight Loss

Locations:
Barnes-Jewish West County Hospital – Medical Office Building 4
Barnes-Jewish Hospital
Barnes-Jewish West County Hospital

Jaquelyn Fleckenstein

Jaquelyn Fleckenstein, MD

Gastroenterology
Liver Health (Hepatology)

Locations:
Center for Advanced Medicine Gastrointestinal Center
Barnes-Jewish Hospital
Center for Advanced Medicine – South County

Cassandra Fritz, MD, MPHS

Cassandra Fritz, MD, MPHS

Gastroenterology

Locations:
Center for Advanced Medicine Gastrointestinal Center
Barnes-Jewish West County Hospital

Maté Gergely, MD

Maté Gergely, MD

Gastroenterology
Inflammatory Bowel Disease

Locations:
Barnes-Jewish West County Hospital – Medical Office Building 4
Center for Advanced Medicine – South County

Angela Gieseler, PA-C, MMS

Gastroenterology
Internal Medicine

Locations:
Center for Advanced Medicine
Barnes-Jewish West County Hospital – Medical Office Building 1
Center for Advanced Medicine – South County
Barnes-Jewish West County Hospital – Medical Office Building 4

Martin Gregory, MD

Martin H Gregory, MD, MSCI

Gastroenterology
Inflammatory Bowel Disease

Locations:
Center for Advanced Medicine Gastrointestinal Center
Barnes-Jewish West County Hospital – Medical Office Building 4

Anas Gremida, MD

Anas Gremida, MD

Gastroenterology
Inflammatory Bowel Disease

Locations:
Center for Advanced Medicine Gastrointestinal Center

C. Prakash Gyawali, MD, MRCP

Gastroenterology

Locations:
Center for Advanced Medicine Gastrointestinal Center
Barnes-Jewish West County Hospital – Medical Office Building 4

Samantha Halpern, MSN, APRN, FNP-C

Gastroenterology
Liver Health (Hepatology)

Locations:
Center for Advanced Medicine