Mealey's (May 3, 2018, 1:46 PM EDT) -- ST. LOUIS — The Eighth Circuit U.S. Court of Appeals on April 25 granted a motion by counsel for the U.S. secretary of Labor to participate in oral argument in a dispute over whether a health insurer acted reasonably in permitting cross-plan offsetting, a method to recoup overpayments it made to medical providers (Louis J. Peterson, et al. v. UnitedHealth Group Inc., et al., No. 17-1744, 8th Cir.)....