Matthew J. Giefer, MD, is a pediatric gastroenterologist at Ochsner Children's and sees patients at Ochsner Children’s Health Center - New Orleans in New Orleans, Louisiana. Dr. Giefer treats common childhood GI problems such as abdominal pain, constipation, reflux, and nausea and vomiting, and he also cares for rare and complex conditions. He has a special focus on advanced endoscopy and pancreatic/biliary disease. His research includes causes and treatments for pediatric pancreatitis and how to use advanced endoscopic procedures safely in children.

Dr. Giefer earned his medical degree with honors from Loyola University Chicago in Chicago, Illinois, in 2006, completed a pediatrics residency at the University of Vermont in Burlington, Vermont, and finished fellowships in pediatric gastroenterology and advanced endoscopy at the University of Washington in Seattle, Washington. He is board certified in general pediatrics and pediatric gastroenterology and is a professor of pediatrics at Xavier University of Louisiana.

Families who see Dr. Giefer consistently praise his listening skills, his ability to reach difficult diagnoses and the way he explains diseases and treatment plans in clear, understandable language. They describe him as calm, thorough and focused on making sure parents and children understand next steps and feel supported.

Dr. Giefer serves on multiple national boards and has written more than 70 articles. In 2026, Dr. Giefer was appointed by the Governor of Louisiana to serve on the Louisiana Department of Heath pediatric committee.