"The lawsuit from the American Hospital Association and the American Medical Association does not seek to halt the law from going into effect in January. Instead, it seeks a change in a key provision in regulations issued in September. At issue is how arbitrators will decide the amount insurers pay toward disputed out-of-network bills." [American Medical Association v. HHS, No. 21-3231 (D.D.C. complaint filed Dec. 9, 2021)]