Which statement accurately describes eligibility for enrolling in a Medicare Advantage Plan?

• A. Part A entitlement only.
• B. Service area residency only.
• C. Part B enrollment only.
• D. All of the above.

Answer: (C)

The essential point is what condition makes someone eligible to enroll in a Medicare Advantage Plan. You must be enrolled in Part B to join an MA plan, because Part B provides the medical coverage framework that MA plans coordinate with. Part A is usually already in place for most people, and while being in the plan’s service area is also required, Part B enrollment is the gating factor that determines eligibility among the options given. So the statement that Part B enrollment is required best captures the key requirement, whereas Part A entitlement alone or residency alone wouldn’t by themselves guarantee enrollment.