![Nicholas O. Davidson, MD, DSc](https://gastro.wustl.edu/wp-content/uploads/2016/10/Davidson.jpg)
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
- Phone: 314-362-2027
- Fax: 314-362-2505
![David H. Alpers, MD](https://gastro.wustl.edu/wp-content/uploads/2016/10/David-Alpers-280x386-1-280x386.jpg)
David H. Alpers, MD
Emeritus William B. Kountz Professor of Medicine
Co-Director, Center for Human Nutrition
- Phone: 314-362-8943
- Fax: 314-362-8230
![Surachai Amornsawadwattana, MD](https://gastro.wustl.edu/wp-content/uploads/2019/07/Surachai-Amornsawadwattana-280x386-1-280x386.jpeg)
Surachai Amornsawadwattana, MD
Assistant Professor of Medicine
- Phone: 314-747-2066
- Fax: 314-362-2357
![Michael C Bennett, MD](https://gastro.wustl.edu/wp-content/uploads/2017/07/Michael-Bennett-280x386-1-280x386.jpeg)
Michael C Bennett, MD
Associate Professor of Medicine
- Phone: 314-747-2066, press option 1
- Fax: 314-747-5871
![Elizabeth Blaney, MD](https://gastro.wustl.edu/wp-content/uploads/2016/10/elizabeth_blaney.jpg)
Elizabeth Blaney, MD
Associate Professor of Medicine
- Phone: 314-747-2066, Press option 1
- Fax: 314-747-5871
![Default image](https://gastro.wustl.edu/wp-content/plugins/washu-people-places-items//assets/images/default-people.jpg)
Rebecca Carpenter, MSN, BSN, RN, ANP-BC
Adult Nurse Practitioner
- Phone: 314-747-2066
- Fax: 314-747-1277
![Chien-Huan Chen, MD, PhD](https://gastro.wustl.edu/wp-content/uploads/2016/10/DrChen_2024_extractedHeadshot-280x386.jpg)
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
- Phone: 314-747-2066
- Fax: 314-747-5871
![Matthew Ciorba, MD](https://gastro.wustl.edu/wp-content/uploads/2016/10/Ciorba-Matthew_Gastro_1400x1930-20230926-280x386.jpeg)
Matthew Ciorba, MD
Professor of Medicine
Director, Inflammatory Bowel Diseases Program
Director, IBD Research
Associate Director, GI Fellowship Program and T32 Research
- Phone: 314-747-2066
- Fax: 314-747-5871
![Jeffrey S. Crippin, MD](https://gastro.wustl.edu/wp-content/uploads/2016/10/Crippin.jpg)
Jeffrey S. Crippin, MD
Professor of Medicine
Marilyn E. Bornefeld Chair in Gastrointestinal Research and Treatment
Associate Chairman for Clinical Programs
- Phone: 314-747-2066
- Fax: 314-454-5108
![Nicholas O. Davidson, MD, DSc](https://gastro.wustl.edu/wp-content/uploads/2016/10/Davidson.jpg)
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
- Phone: 314-362-2027
- Fax: 314-362-2505
![Brian K. Dieckgraefe, MD, PhD](https://gastro.wustl.edu/wp-content/uploads/2016/10/Dieckgraefe.jpg)
Brian K. Dieckgraefe, MD, PhD
Associate Professor of Medicine
Chief of Gastroenterology, St. Louis VA Medical Centers
- Phone: 314-289-6434
- Fax: 314-362-8959
![Jaquelyn F. Fleckenstein, MD](https://gastro.wustl.edu/wp-content/uploads/2016/10/Fleckenstein.jpg)
Jaquelyn F. Fleckenstein, MD
Professor of Medicine
Director, Hepatology Program
Director, Advanced Hepatology Fellowship
- Phone: 314-747-2066
- Fax: 314-454-5108
![Angela Gieseler, PA-C, MMS](https://gastro.wustl.edu/wp-content/uploads/2023/02/Gieseler-Angela_Gastro_04-280x386.jpg)
Angela Gieseler, PA-C, MMS
Physician Assistant
- Phone: 314-747-2066, Press option 1
- Fax: 314-747-5871
![C. Prakash Gyawali, MD, MRCP](https://gastro.wustl.edu/wp-content/uploads/2016/10/Gyawali-Prakash_11022023-C-280x386.png)
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
![Deborah Hiatt-Jensen, MSN, APRN, FNP-C](https://gastro.wustl.edu/wp-content/uploads/2017/02/Deborah-Hiatt-Jensen-280x386-1-280x386.jpg)
Deborah Hiatt-Jensen, MSN, APRN, FNP-C
Adult Nurse Practitioner
- Phone: 314-747-2066
- Fax: 888-869-4437
![Devika Kapuria, MD, MBBS](https://gastro.wustl.edu/wp-content/uploads/2021/09/Kapuria.jpg)
Devika Kapuria, MD, MBBS
Assistant Professor of Medicine
- Phone: For new patients, please call: 314-747-2066, option 1 For established patients, please call: 314-362-3903
- Fax: 314-747-5871
![Kevin Korenblat, MD](https://gastro.wustl.edu/wp-content/uploads/2016/10/Korenblat.jpg)
Kevin Korenblat, MD
Professor of Medicine
Medical Director, Liver Transplantation
- Phone: 314-747-2066
- Fax: 314-454-5108
![Vladimir Kushnir, MD](https://gastro.wustl.edu/wp-content/uploads/2016/10/Kushnir.jpg)
Vladimir Kushnir, MD
Professor of Medicine
Director, Endoscopic Research
Director, Bariatric Endoscopy
Director, Interventional Endoscopy
- Phone: 314-362-5038
- Fax: 314-747-1277