Jason Zhang

Jason Zhang, MD, PhD, is an Attending Physician in the Division of Gastroenterology, Hepatology and Nutrition and Instructor at Harvard Medical School. His clinical expertise includes abdominal pain, constipation, Crohn's disease, diarrhea, eosinophilic esophagitis, fatty liver, GERD, inflammatory bowel disease, and ulcerative colitis in pediatric populations. Research focuses on microbiome dynamics, inflammatory bowel disease, and pediatric obesity therapeutics.

His publications demonstrate strong research interests in microbiome changes related to medication use, inflammatory bowel disease presentations during COVID-19, and genetic factors in congenital enteropathies. Recent work explores gut microbiome engraftment patterns and equity-focused clinical education models.