Kathryn Harris, NP Nurse Practitioner, Medical Intensive Care Unit Image Email Email Me Print Profile Request an Appointment Locations Boston Boston Children's Hospital 300 Longwood Ave. Boston, Massachusetts 02115 Phone: 617-355-6000 Listen Kathryn Harris, NP Nurse Practitioner, Medical Intensive Care Unit Medical Services Programs & Services Medical Critical Care Medical Intensive Care Unit Locations Boston Boston Children's Hospital 300 Longwood Ave. Boston, Massachusetts 02115 Phone: 617-355-6000