Julie Ann O'Neill, MS Senior Exercise Physiologist, Department of Cardiology Image Phone 617-355-5445 Email Email Me Print Profile Request an Appointment Locations Boston Boston Children's Hospital 300 Longwood Ave. Boston, Massachusetts 02115 Listen Julie Ann O'Neill, MS Senior Exercise Physiologist, Department of Cardiology Medical Services Programs & Services Cardiac Fitness Program Exercise Physiology Lab Cardiology Languages English Locations Boston Boston Children's Hospital 300 Longwood Ave. Boston, Massachusetts 02115