Leah Abecassis, MSN, RN, CCRN, CWOCN Nurse Practice Specialist, Medical Intensive Care Unit Image Print Profile Request an Appointment Locations Boston Boston Children's Hospital 300 Longwood Ave. Boston, Massachusetts 02115 Listen Leah Abecassis, MSN, RN, CCRN, CWOCN Nurse Practice Specialist, Medical Intensive Care Unit Medical Services Programs & Services Medical Intensive Care Unit Languages English Locations Boston Boston Children's Hospital 300 Longwood Ave. Boston, Massachusetts 02115