Rep. Tom Price (R) of Georgia is said to be President-Elect Trump's choice to lead the Department of Health and Human Services. He is the one who told us little more than a week ago that Congress would move on phasing out Medicare in 6 to 8 months (i.e., early summer 2017). He also predicted and advocated pushing the phaseout through with 50 votes in the Senate.
Most health care policy goes through HHS. So he's now the administration point man on Medicare phaseout.