Doctors' Hospital of Michigan has named a new president/CEO, the physician-owned hospital's third leader this year. The board of directors for Pontiac-based Doctors' has appointed Sam Gizzi to replace David M. Sessions, who resigned on Oct. 17. Sessions, who previously worked for St. John Providence Health System, joined the hospital in March after Doctors' physician owners in February bought out McLaren Health Care Corp.'s 35% stake in Doctors' and pooled together $3 million to settle a loan with McLaren. Clarence Sevillian, a McLaren employee, had headed the hospital for two years and now is CEO of POH Regional Medical Center in Pontiac. Gizzi joins Doctors' Hospital with a background in healthcare finance and managed care. He previously worked for Henry Ford Health System, St. John Providence, Mount Clemens General Hospital, the Detroit Medical Center and TheraMatrix Physical Therapy in roles ranging from financial analyst and managing budgets to heading managed care.