Medicaid and Medicare are similar
programs that are publicly run. They cover 62 million and 43
million Americans, respectively. They each use their large
membership to negotiate lower prices with hospitals and doctors.
Medicaid tends to have the lowest payment rates. On average,
Medicaid pays 66 percent of what Medicare pays doctors.
Incidentally, US Census Bureau as of 2015 shows population of
about 318 million Americans, including 23 million non-citizens.