Which type of service would typically require prior authorization under Medicare?

High-cost inpatient procedures typically require prior authorization under Medicare because these types of services involve significant financial implications for both the patient and the insurance provider. Prior authorization is a process used by Medicare to ensure that the proposed procedure is medically necessary and that it aligns with established guidelines before approving coverage. This requirement helps control costs and prevent unnecessary procedures that could burden the healthcare system.

In contrast, emergency services usually do not require prior authorization to ensure timely access to care. Screening tests often fall under preventive services, which are generally covered without prior authorization because they are intended to catch health issues early and promote preventive care. Routine check-ups are also typically exempt from prior authorization as they represent standard preventive healthcare visits that do not usually involve advanced procedures.