Health care providers cannot sue states over Medicaid reimbursement rates that they contend are too low to ensure delivery of services under the federal-state program for poor and low-income individuals, a divided U.S. Supreme Court ruled on Tuesday.

In a 5-4 decision in Armstrong v. Exceptional Child Center, the majority led by Justice Antonin Scalia said the U.S. Court of Appeals for the Ninth Circuit was wrong when it held the providers had “an implied right of action” to seek injunctive relief.