CFR > Title 42 - Public Health > CHAPTER IV—CENTERS FOR MEDICARE & MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES > SUBCHAPTER B—MEDICARE PROGRAM (parts 405 to 426) > PART 421—MEDICARE CONTRACTING > SUBPART F—Medical Review (§421.500 to §421.505) > 421.500—Medicare review function.

421.500—Medicare review function.

CMS enters into contractual agreements with intermediaries, carriers, Medicare Administrative Contractors (MACs), and program safeguard contractors (PSCs) to perform medical review functions not for benefit integrity purposes to ensure that items or services are covered and are reasonable and necessary in accordance with Medicare coverage policies and program instructions.