Keith Hazleton, MD, PhD is a pediatric hepatologist in the Division of Gastroenterology, Hepatology and Nutrition at Children's Hospital Los Angeles and Assistant Professor of Clinical Pediatrics at the Keck School of Medicine of USC. His research interests include gut microbiome dysbiosis in pediatric disease, with a focus on diet-microbiome interactions in Clostridioides difficile infection and emerging work on the gut-liver axis in biliary atresia. His PhD training at Albert Einstein College of Medicine focused on purine salvage pathway enzymology and transition state analogue inhibitor development targeting Plasmodium falciparum.

Dr. Hazleton is dedicated to mentoring medical students, residents, and fellows in pediatric gastroenterology and hepatology. He serves on the NASPGHAN Research Committee, where he previously co-chaired the Grants Subcommittee and currently serves on the Abstracts Subcommittee.