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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 Phone: 617-355-6000 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 Phone: 617-355-6000