If you have a Medicare Advantage plan or a Medicare Prescription Drug plan watch your mail. You will be receiving very important information from your insurance company about what your plan will cost and cover in 2015. Open it! Don't set it aside because you may miss out on being able to change your plan for 2015. Medicare's open enrollment period is October 15 - December 7. That letter will tell you if you need to change plans for 2015. It is smart to shop and compare Medicare plans during open enrollment to make sure you still have the right plan at the right price for you!