I have a guy who has been on Medicare Advantage for 3 years now who wants to go back to Original Medicare. What I never understood is why Medicare doesn't tell people who have been on Medicare Advantage for more than a year that if they want to go back to Original Medicare, they have to have it done by December 7th. Why is there an enrollment period for Medicare Advantage from January 1st through March 31st? It never made sense to have two enrollment periods.