Caleb: I'm retired celecoxib for costochondritis ig Advantage plans, which combine Part A (hospitalization) Part B (outpatient services) and usually Part D (prescription drugs), are on a big-time roll. Enrollment has jumped an impressive 10 percent in each of the past three years, according to data compiled by the Kaiser Family Foundation (KFF), a non-profit healthcare research and policy organization. About 28 percent of all Medicare enrollees this year are in an Advantage plan.