Gastroenterology

Dr. Keerthi Shah is a gastroenterology fellow whose interests include obesity and nutrition.

Dr. Janese Laster is a Gastroenterologist currently practicing in Washington, DC. She completed both Internal Medicine residency and Gastroenterology fellowship training at Georgetown University Hospital. She then completed both a Nutrition and Bariatric Endoscopy Fellowship programs. She is now quadruple board certified in Internal Medicine, Gastroenterology, Obesity Medicine, and Nutrition. She is the owner of Gut Theory Total Digestive Care, which is an all-inclusive weight management practice to include evidence based nutrition care, weight loss...

Dr. Margarita (Rita) German is a faculty member in the Division of Gastroenterology and Hepatology within the Department of Medicine, and Associate Program Director of the Transplant Hepatology Fellowship. She is a member of the American Association for the Study of Liver Diseases and American Society of Transplantation and is involved in training medical students and residents. Dr. German’s clinical interests focus on general hepatology and transplant hepatology, including caring for patients with advanced liver...

Dr. Madhulika (Mika) Varma, chief of colorectal surgery at UCSF Medical Center, specializes in diseases of the colon, rectum and anus. Her areas of expertise include colorectal and anal cancer, inflammatory bowel diseases such as ulcerative colitis and Crohn's disease, and pelvic floor disorders. She also is a specialist in treating many of these diseases using laparoscopic (minimally invasive) surgical techniques. Dr. Varma is director of the Center for Pelvic Physiology, which evaluates patients with...

Dr. Maria M. Oliva-Hemker is the Stermer Family Professor of Pediatric Inflammatory Bowel Disease and Professor of Pediatrics at the Johns Hopkins University School of Medicine. Her areas of clinical expertise include gastrointestinal diseases, inflammatory bowel disease (IBD) and pediatric gastroenterology. She serves as the director of the Division of Pediatric Gastroenterology, Hepatology and Nutrition at the Johns Hopkins Children’s Center. In 2021 Dr. Oliva-Hemker was named Vice Dean for Faculty. Dr. Oliva-Hemker received her...