If you have a Medicare health or prescription drug plan, you only have until the end of Open Enrollment, December 7th, to make changes to your 2019 plan. Even if you're happy with your current Medicare coverage, you might find something better, like a Medicare Advantage plan from private insurers. With a Medicare Advantage plan, people with Medicare can get extra benefits-like dental and vision care, prescription drug coverage-all in one plan. Four out of five people with Medicare Advantage plans pay less than $50 per month. If you miss the Open Enrollment deadline, most people will have to wait a full year before they can make changes to their plans.