Medicare Part A is your hospital care which helps pay for inpatient care, critical access hospitals, skilled nursing facilities, hospice care, and some home health care.
Medicare Part B is your medical insurance which helps pay for doctors' services, outpatient care, and other medical services that Part A doesn't pay for.
Medicare Part D is your recently introduced prescription drug coverage.
Some Medicare Advantage plan salespeople have been caught using hard-sell tactics to pressure seniors into signing up for policies that may leave them worse off than they would be with traditional Medicare coverage.