Prima CARE , P.C. sent data breach notification letters to 1,651 patients after it recovered a binder containing personal information . The documents were found in the pushes in a parking lot on May 25 , 2015 . Prima said in an announcement on its website that it became aware of the incident on June 4 , 2015 . Potentially compromised information includes names , addresses , phone numbers , dates of birth , medical record numbers , hospital account numbers , insurance numbers , treatment date(s ) and certain clinical information . The information was on patients who received care from Prima healthcare providers between 2007 and 2012 . " The binders were promptly returned after being discovered and are now safely in Prima CARE 's possession , " the statement read . " An investigation determined that the binders were created by a former Prima CARE employee who used the information to track work performance , but had failed to appropriately file or discard the documents following their use . " Prima added that the improper disposal was done without its knowledge or consent , and was in violation of its practices . " We take the privacy and security of our patients ' information seriously and have taken steps to mitigate the potential for any harm to result from this incident and to prevent a similar event from occurring in the future , " Prima explained . ;