The difference between Medicare open enrollment for the Health care marketplace and fall Medicare open enrollment is that the marketplace is for under-insured and uninsured Americans. The market place is not for Americans who are enrolled into Medicare.
Medicare enrollees should use fall open enrollment to change their plans or purchase a Medicare plan. People on Medicare should use fall open enrollment to review and make changes to their current plans.
The best way to enroll in a Medicare plan during fall open enrollment is to call 800-Medicare. Its is important to confirm all details about a new plan before you enroll or make changes to your current Medicare plan.