Michael A. Zimmerman

See our team of pediatricians for kid checkups, illness, and other questions as your child grows.

John F. Valentine, MD, is a Professor of Medicine at the University of Utah School of Medicine in the Division of Gastroenterology, Hepatology and Nutrition and specializes in ulcerative colitis and Crohn’s disease. His clinical interests and expertise are in inflammatory diseases of the intestinal tract that include inflammatory bowel disease (ulcerative colitis and Crohn’s disease) and celiac disease.Dr. Valentine received his M.D. degree from the University of Texas Medical School at Houston in 1985. He received his training in Internal Medicine at the Medical College of Virginia-Virginia Commonwealth University Medical Center and his training in Gastroenterology at the University of Florida. While on faculty at the University of Florida, he rose to the position of Professor of Medicine, served as the Chief of the Gastroenterology Section at the Malcom Randal Veterans Administration Medical Center, and founded the Southeastern Center for Inflammatory Bowel Disease. He remains active with the Crohn’s and Colitis Foundation of America and has served a Co-Chair of the CCFA patient education committee and was a member of the editorial board for the journal Inflammatory Bowel Disease. Dr. Valentine is a Fellow in the American Gastroenterological Association and the director of the University of Utah Inflammatory Bowel Disease Center. Dr. Valentine has extensive experience with treating patients with inflammatory bowel disease and he is developing laboratory research and clinical trials in ulcerative colitis and Crohn’s disease in order to expand the understanding and treatment options for patients with these diseases.

M. Jason Penrod, MD is a clinical assistant professor at the University of Utah Hospitals and Clinics. As a General Internist, his clinical interests include hypertension, musculoskeletal problems, and preventative medicine.