what percentage of medicare eligible beneficiaries are enrolled in a private medicare advantage plan
18 percent of beneficiaries are enrolled in Medicare Advantage plans. 2 This brief describes how those private plans function, how they are paid, how their costs com-pare with the costs of traditional Medicare, and how those costs vary by geographic area. In summary: B Enrollment in Medicare Advantage is growing rapidly, particularly in a relatively unmanaged type of plan called private fee for service (PFFS). B Medicareâs payments for beneficiaries enrolled in Medicare Advantage plans are higher, on average, than what the program would spend if those beneficiaries were in the FFS sectorâso shifts in enrollment out of