Gastroenterology, Hepatology and Nutrition | Fellowships | Meet the Fellows

1st Year Fellows

Jenna Diaz, MD attended the University of Missouri in Columbia, MO for her undergraduate studies, earning a BS in Biology. She completed her medical training there as well. Her pediatric residency training was in Miami, FL at the Nicklaus Children's Hospital. As a Gastroenterology Fellow at Washington University in St. Louis she is interested in nutrition, short bowel syndrome and inflammatory bowel disease. In her free time, she enjoys running, spending time with family and traveling.
Kimberly Sutton, MD graduated from the University of Notre Dame, earning a BS in science business. She completed her medical training at the University of Illinois College of Medicine and her Pediatric Residency training at St. Louis Children's Hospital. Currently, she is a fellow with the Pediatric Gastroenterology Fellowship Program at Washington University School of Medicine in St. Louis, Missouri. Her research interests include IBD and endoscopy. She enjoys cooking, traveling and spending time with her husband.

2nd Year Fellow

Chaowapong (Chao) Jarasvaraparn, MD, graduated from Medical School at Ramathibodi Hospital, Mahidol University in Bangkok, Thailand. He completed his Pediatric Residency training at the University of South Alabama in Mobile, Alabama. Currently, he is a fellow with the Pediatric Gastroenterology Fellowship Program at Washington University School of Medicine in St. Louis, Missouri. His research interests include sleep disturbance associated with Inflammatory Bowel Disease, a pH probe-impedance study in GERD, cow milk protein intolerance. His hobbies include going to the gym, tennis, hanging out with friends, traveling and good coffee.

3rd Year Fellows


Mallory Cohen, MD obtained her undergraduate degree in neurobiology, physiology and behavior at University of California, Davis and medical degree at St George's University. She completed her Pediatric Residency training at University of Nevada in Las Vegas. Her interests in the field are Inflammatory Bowel Disease and hepatology. She enjoys hockey games, spending time with family, visiting the beach and traveling.

Nadia Naz, MD completed medical education from Dow University of Health Sciences, Karachi, Pakistan and Pediatric Residency training from SUNY Downstate Medical Center, Brooklyn, NY. She then decided to join a Pediatric Gastroenterology Fellowship Program at Washington University School of Medicine in St. Louis. She is interested in doing an additional fellowship year in Advanced Transplant Hepatology. Nadia enjoys participating in fundraising for charities, cooking, sightseeing and traveling, in her spare time.
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