Summa Health CEO Cliff Deveny is stepping down from his role, weeks after the health system finalized a merger with health tech company HATCo. Devey will transition to CEO emeritus and strategic advisor on January 1, 2026, and HATCo President Daryl Tol will serve as acting president and CEO of Summa until a permanent replacement can be found. Summa Health said Deveny will continue to be actively engaged in the organization through 2026 and will be part of the search for a new president and CEO.