Which entity performs prepayment review to ensure services provided to beneficiaries are medically necessary?

Medicare Administrative Contractors (MAC) play a crucial role in the Medicare program by overseeing the claims process, including the prepayment review of services. Their primary responsibility is to ensure that the services billed to Medicare align with the criteria for medical necessity as set by Medicare guidelines. By conducting prepayment reviews, MACs analyze claims before payment is made to confirm that the services provided are appropriate and necessary for the patient's diagnosis or condition. This process helps to prevent improper payments and ensures the integrity of the healthcare system.

The other entities mentioned do not specifically focus on prepayment reviews for Medicare beneficiaries. Insurance Review Boards may engage in reviewing claims but are typically associated with private insurance providers rather than the specific processes outlined for Medicare. Healthcare Providers are responsible for delivering services and submitting claims but do not perform the reviews necessary to establish medical necessity. Claims Assessment Agencies might evaluate claims but are not primarily responsible for the prepayment review function that MACs perform in the Medicare context.