Age 65 or older.

Under age 65 with certain disabilities.

Any age with permanent kidney failure.

Medicare Part A, which provides insurance for hospital and other inpatient facilities.

Medicare Part B, which provides insurance for outpatient services.

Medicare Part C, which provides Medicare managed care. The costs of the plan may vary, depending on the terms of the plan in which an individual participates.

Medicare Part D, under which individuals can elect to receive prescription drug coverage (see Article, ACA Changes to Medicare Part D Affecting Retiree Medical Plans and Practice Note, Medicare Part D Creditable Coverage Disclosures and Group Health Plans). The costs of the plan and covered drugs may vary, depending on the terms of the plan in which an individual participates.