Kathryn O'Callaghan, ADN, RN Staff Nurse, Department of Otolaryngology and Communication Enhancement Image Print Profile Request an Appointment Locations Boston Boston Children's Hospital 300 Longwood Ave. Boston, Massachusetts 02115 Listen Kathryn O'Callaghan, ADN, RN Staff Nurse, Department of Otolaryngology and Communication Enhancement Medical Services Programs & Services Otolaryngology and Communication Enhancement Locations Boston Boston Children's Hospital 300 Longwood Ave. Boston, Massachusetts 02115