A bipartisan group of lawmakers pushed back against the Obama administration’s proposed rule requiring Medicare and Medicaid providers to try an alternative drug payment model, saying it would hinder care for seniors with ailments including cancer and neurological disorders.

Congressmen expressed their concern about the alternative Medicare Part B drug payment model in a letter to Centers for Medicare and Medicaid Services Acting Administrator Andy Slavitt Monday. Republican Reps. Tom Price, John Shimkus and Charles Boustany Jr. led the effort, but the letter was signed by dozens of members on both sides of the aisle.