Mealey's (December 30, 2021, 7:17 AM EST) -- WASHINGTON, D.C. — In three amicus curiae briefs filed Dec. 22 and 23, entities including the U.S. government join health plan defendants in urging the U.S. Supreme Court to reverse a split Sixth Circuit U.S. Court of Appeals panel’s ruling that a complaint over linking dialysis reimbursement rates to Medicare rates plausibly alleged violation of the Medicare Secondary Payor Act (MSPA) under a discrimination-by-proxy or a disparate-impact theory....