Mountain Vista Medical Center in Mesa, Ariz., has selected William Comer to serve as president.
Mr. Comer most recently was chairman, president and CEO of Paradise Valley Hospital in National City, Calif., and Bayview Behavioral Health Hospital in Chula Vista, Calif.
He has more than 20 years of leadership experience, including as CEO of the Surgical Hospitals in Phoenix and senior vice president of operations for Nueterra Healthcare in Kansas City, Kan.
Mr. Comer holds a master's degree in healthcare administration from Washington University in St. Louis.