As of about 2015 over half the people fully signing up for Medicare for the first time are choosing a public Part C plan of some type as opposed to FFS Medicare ( as reflected in the 0 % to over 35 % penetration rate growth in 21 years ) .As noted millions more beneficiaries are on Part C since 2011 than before 2011 and the per-person cost numbers have been at parity or below since 2012 .
The penetration rate of the Medicare Part C plan grew from 0 % to over 35 % in 21 years .