Courtney Gentry, RN, BSN Registered Nurse, Department of Cardiology Image Print Profile Request an Appointment Locations Boston Boston (300 Longwood Ave.) 300 Longwood Ave. Boston, Massachusetts 02115 Phone: 617-355-6000 Listen Courtney Gentry, RN, BSN Registered Nurse, Department of Cardiology Medical Services Programs & Services Electrophysiology Cardiology Languages English Locations Boston Boston (300 Longwood Ave.) 300 Longwood Ave. Boston, Massachusetts 02115 Phone: 617-355-6000