About 2,400 patients of University of Massachusetts Memorial Medical Center ( UMMMC ) are being notified that their personal information including Social Security numbers was accessed by a former employee and may have been used to open commercial accounts . How many victims ? About 2,400 , according to reports . What type of personal information ? Names , addresses , dates of birth and Social Security numbers . What happened ? A former employee accessed the personal information of patients and the data may have been used to open commercial accounts . What was the response ? UMMMC opened an internal investigation that is ongoing with law enforcement . UMMMC is enhancing security and enforcing education of policies and procedures to protect patient information . All impacted patients are being notified . The employee no longer works at UMMMC , according to a notification posted on the UMMMC website . Details : UMMMC learned of the incident on March 6 . The employee had access to patient information between May 6 , 2002 , and March 4 . The information could have been used to open credit card and cell phone accounts . Quote : We are not aware of the misuse of any medical information , according to the notification . Source : umass - memorial - hospital - main , Important Privacy Incident Notice for UMass Memorial Medical Center Patients , 2014 . ;