When Franciscan Alliance, a 13-hospital health system serving Indiana and Illinois, migrated a 140-physician group practice to its new Epic electronic health record (EHR) system, the physicians needed to access vital signs and patient identifiers for 250,000 patients – millions of records that were not part of the initial year-long data conversion project. Using interoperability technology from InterSystems, a global health information technology company, and drawing on the expertise of professional services firm EHR Evolution, Franciscan Alliance found a way to ease the transition.