Dr. MacArthur is a graduate of Brown University in Providence, Rhode Island. She received her medical degree from the University of Connecticut School of Medicine. She completed her internal medicine residency at Beth Israel Deaconess Medical Center in Boston, Massachusetts, and her gastroenterology fellowship at Boston Medical Center. Dr. MacArthur is an active member of the American College of Gastroenterology and the American Society for Gastrointestinal Endoscopy Dr. MacArthur has advanced training in inflammatory bowel disease, celiac sprue, colon cancer screening, pelvic floor dysfunction, and liver disorders including Hepatitis C and non-alcoholic fatty liver disease. She is proficient in upper and lower diagnostic and therapeutic endoscopy as well as capsule endoscopy. Dr. MacArthur is skilled in the management of all forms of gastrointestinal bleeding, polypectomy, and endoscopic dilation.