The University of North Carolina at Chapel Hill School of Medicine today announced it is mailing notification letters to an estimated 3,716 persons whose information may have been affected in a cyber phishing incident involving some School of Medicine email accounts . A leading independent forensic firm conducted a lengthy and extensive review that concluded on Sept. 13 , 2019 , and confirmed that an unauthorized third party gained access to several email accounts during the approximate timeframe of May 17 , 2018 , to June 18 , 2018 . This review confirmed that some patients ’ personal information was contained in the affected email accounts , possibly related to treatments received when they were seen by a UNC physician . ;