Lawmakers and beneficiary advocates are pressing HHS to pause the impending expansion of a Medicare model that relies on prior authorization to reduce improper ambulance payments, arguing that unless gaps in the program are filled with non-emergency transport, going nationwide will harm patients with end-stage renal disease who need transport to dialysis and wound care visits. Medicare currently only covers repetitive, scheduled non-emergency ambulance transport (RSNAT) for patients that are too sick or frail to travel to appointments by other...