Mackenzie Jefferson, BSN, RN Staff Nurse II, Department of Urology Image Phone 617-355-7796 Print Profile Request an Appointment Locations Boston Boston Children's Hospital 300 Longwood Ave. Boston, Massachusetts 02115 Listen Mackenzie Jefferson, BSN, RN Staff Nurse II, Department of Urology Medical Services Programs & Services Kidney Stone Program Urology Conditions & Treatments Kidney Stones Languages English Locations Boston Boston Children's Hospital 300 Longwood Ave. Boston, Massachusetts 02115