John Oliverio president and chief executive officer of Wheaton Franciscan Healthcare since 2000, with oversight of a health system with operations in three states and roughly 17,100 employees, including 610 physicians, recently talked about the challenges facing Wheaton Franciscan and other health systems, managing a large, complex organization. His top challenges include declining reimbursements, the growth of uncompensated care, and the shift toward population management.