You can get your Medicare coverage through the federal government or a private insurance company.
Original Medicare Parts A and B is administered by the federal government. Medicare Advantage plans (Part C) are an alternative to Original Medicare offered by private insurance companies.
Medicare prescription drug plans are also offered by private insurance companies. These plans may be added to Original Medicare.
Change How You Get Your Coverage
To leave Original Medicare and enroll in a Medicare Advantage (Part C) plan, all you need to do is sign up for the new plan. You don't have to tell Original Medicare about the change.
You can switch from a Medicare Advantage plan to Original Medicare by notifying the plan that you want to disenroll. Your coverage will automatically revert to Original Medicare.
If you go back to Original Medicare, you may want to add a prescription drug plan (Part D) to your coverage. Remember that you cannot be without creditable coverage longer than 63 days without incurring a premium penalty.
Switch to a Different Private Medicare Plan
To change from one Medicare Part C or Part D plan to another, you can just sign up for the new plan.
Typically, you are automatically disenrolled from your old plan. You may want to notify the old plan about the change for good measure. But it's not required.
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