Operates somewhat separately from the rest of Medicare--if you opt for C, you must first qualify for A,B but you opt to pay a bit more)
Managed Care
Used to be called Medicare + Choice, now re-branded MedicareAdvantage (2003)
Higher Premiums (pay more money per month, but better coverage than A or B)
Includes Drugs
C is a private alternative to A and B
In C, a private entity/private insurance company gets money (that would usually go to part A, B) from the government from General Revenue, State taxes, etc.