Jennifer Mullen, RN Staff Nurse, Cardiac Intensive Care Unit Image Print Profile Request an Appointment Locations Boston Boston Children's Hospital 300 Longwood Ave. Boston, Massachusetts 02115 Listen Jennifer Mullen, RN Staff Nurse, Cardiac Intensive Care Unit Medical Services Programs & Services Cardiac Intensive Care Heart Center Cardiology Languages English Locations Boston Boston Children's Hospital 300 Longwood Ave. Boston, Massachusetts 02115