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