MA

According to Mark Farrah Associates as of December 1, 2013, there were 15,146,000 people in Medicare Advantage plans, about a 9% increase over the same time last year.  UnitedHealth Group has about 21% of the market, followed by Humana with 16% and Kaiser with 8%.  Around 17% of MA enrollment comes from employer retiree group plans.  2014 open enrollment ended on December 7, so the early indications are that there was strong growth.