The case — Kennedy v. Braidwood Management — questions the way that the government under the Affordable Care Act (ACA) decides which preventive care services should be covered at no cost to patients.

The justices heard arguments in a constitutional challenge to a task force that decides what treatments are covered at no cost.

The Affordable Care Act requires health insurers and group health plans to cover certain preventive-care services recommended by the U.S. Preventive Services Task Force at no cost to patients.