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SANTA BARBARA, Calif. (AP) _ Tenet Healthcare Corp. said Monday it has sent a team of employees to its hospital in Redding, Calif., to review the cardiology program in light of allegations that two doctors performed unnecessary heart operations.

The company said the team is made up of representatives from its law, compliance, quality management, medical affairs and other departments.

The company, which owns and operates 113 hospitals, also hired the medical audit practice of Mercer Consulting Group to review patient records and internal documents related to cases handled by the two doctors at the Redding Medical Center.

Federal agents are investigating Dr. Chae Moon, director of cardiology at the hospital, and Dr. Fidel Realyvasquez Jr., chairman of the center's cardiac surgery program, for ordering costly surgeries for healthy patients and then billing Medicare.

The firm will also review any future cases the two doctors intend to perform. They have not been charged with any wrongdoing.