Audrey Andrews, senior vice president and general counsel at Tenet Healthcare Corp., is using lawyers from Gibson, Dunn & Crutcher for the Dallas company's pending acquisition of Vanguard Health Systems Inc. for $4.3 billion, including $2.5 billion in debt.

Vanguard, based in Nashville, turned to Skadden, Arps, Slate, Meagher & Flom.