As of 2015, the open enrollment period for the Medicare Advantage Program is between October 15 and December 7 every year, according to Medicare. During this time, a Medicare subscriber can switch their Medicare Advantage Plan, switch between Medicare and an Advantage Plan, and add or drop a drug plan.
A Medicare Advantage Plan, sometimes known as Medicare Part C, combines both hospital and medical insurance, but coverage is provided by a private insurance company rather than by Medicare itself, as Medicare explains. Medicare Advantage Plans typically require monthly payments, and they may also require copayments for various services. Most Medicare Advantage Plans include prescription drug benefits, also known as Medicare Part D.