A mammogram is an X-Ray of the breast. No deodorant is to be worn on the day of the exam. Diagnostic mammograms are provided 8:30 a.m. to 4:30 p.m. Monday to Thursday and an emergency service on Friday between 8:30 a.m. and 4:30 p.m. An appointment is necessary prior to a mammogram. NB. If any previous mammograms at any other institutions, please bring them on the day of the exam.