His areas of clinical expertise include pediatric gastroenterology and nutrition and inflammatory bowel disease. Dr. Guerrerio received his M.D. and Ph.D. from the Johns Hopkins University School of Medicine. He completed his residency in pediatrics and did a fellowship in pediatric gastroenterology at Johns Hopkins and then joined the faculty in 2009. His clinical practice focuses on eosinophilic intestinal disease (esophagitis, gastroenteritis and colitis) as well as inflammatory bowel disease—especially in the context of immunodeficiency. He also has a special interest in intestinal problems of those affected by Loeys-Dietz syndrome.Dr. Guerrerio holds a certification in pediatrics and pediatric gastroenterology from the American Board of Pediatrics.