ZeNan Chang, MD, PhD

ZeNan Chang, MD, PhD

Instructor in Medicine

Chien-Huan Chen, MD, PhD

Chien-Huan Chen, MD, PhD

Professor of Medicine
Associate Director of Clinical Affairs
Director, General GI
Director, Patient Safety and Quality
Director, Small Bowel Endoscopy Program

Nicholas O. Davidson, MD, DSc

Nicholas O. Davidson, MD, DSc

John E. and Adaline Simon Professor of Medicine and Developmental Biology
Chief, Division of Gastroenterology
Director, Digestive Disease Research Core Center

  • Fax: 314-362-2505
Jill Elwing, MD

Jill Elwing, MD

Assistant Professor of Medicine

Cassandra Fritz, MD, MPHS

Cassandra Fritz, MD, MPHS

Assistant Professor of Medicine

Angela Gieseler, PA-C, MMS

Angela Gieseler, PA-C, MMS

Physician Assistant

Aaron Greenspan, MD

Aaron Greenspan, MD

Assistant Professor of Medicine

C. Prakash Gyawali, MD, MRCP

C. Prakash Gyawali, MD, MRCP

Professor of Medicine
Director, GI Fellowship Training Program
Director, Neurogastroenterology and Motility Program

  • Phone: 314-747-2066
  • Fax: For Patient Related Faxes Please Use 314-747-1277. For Fellowship Related Faxes Please Use 314-362-3643

Patient-related faxes 314-747-1277

Fellowship-related faxes 314-362-3643

Elizabeth Huebner, MD

Elizabeth Huebner, MD

Associate Professor of Medicine