In its 2019 Medicare Physician Fee Schedule Final Rule (PFS Rule), CMS finalized a regulatory change that updates supervision requirements for Registered Radiologist Assistants and Radiology Practitioner Assistants (collectively, RAs) to reduce the level of supervision necessary to perform diagnostic tests reimbursable by Medicare. Specifically, the PFS Rule revises 42 C.F.R. § 410.32(b) to provide that RAs may perform certain diagnostic tests that would otherwise require a personal level of supervision under direct supervision instead, to the extent permitted by state law and regulations.…