Fax it to: 919-620-5165. Mail it to: Health Information Management. Duke University Health System. P.O. Box 3016. Durham, NC 27710. If you have questions, please email ROI-Requestor3@dm.duke.edu or call our Customer Service Line at 919-684-1700. We are open Monday - Friday, 8:00 am to 4:30 pm..