Mark Fishbein, MD and Maria Greene, MD, are board-certified in pediatric gastroentrology and evaluate patients within this program. Dr. Fishbein is the medical director of the program. He and Dr. Greene work closely with the other healthcare providers to assist your child with various feeding problems. Dr. Fishbein is Attending Physician, Gastroenterology, Hepatology and Nutrition at Lurie Children’s and Associate Professor of Pediatrics at Northwestern University Feinberg School of Medicine. Dr. Greene is Attending Physician, Gastroenterology, Hepatology and Nutrition at Lurie Children’s and Assistant Professor of Pediatrics at the Feinberg School.