Tenet Healthcare Corp. said today that Audrey Gregory is the new chief executive of Placentia-Linda Hospital.

Gregory, a registered nurse by training, was most recently chief operating officer at Dallas-based Tenet’s St. Francis Hospital in Memphis, Tenn. She replaces Kent Clayton, who became chief executive of Los Alamitos Medical Center, another Tenet property, in July.

Placentia-Linda has 114 beds. It ranks No. 16 on the Business Journal’s most recent list of largest hospitals in the county, with net patient revenue of $84 million for the 12 months ended in September 2013 and 12-month pretax net income of $12.7 million.