As of February 1, 2017, total Medicare Advantage membership stood at 19,593,341, with a net gain of 1,389,665 members year-over-year, about 10% over 2016 enrollment. About 34% of the 58 million people eligible for Medicare are enrolled in an Advantage plan. About 68% of the 19.5 million members are enrolled in one of the 10 largest Medicare Advantage plans. Of the 19.5 million enrolled in Medicare Advantage, about 2.3 million (nearly 12%) are enrolled in specialty plans. About 1.9 million (10%) are dually eligible for Medicaid and are enrolled in . . .