[Number 6]

That is correct. A Medicare benificary may be responsible for the 20% copay should they not have a secondary as well as any uncovered service. Should you have a Medicare Advantage Plan, then all bets are off. There is co pays, co insurance and uncovered services. They are just like private insurace. What I also wanted to point out is that the physican or hospital is mandated by law to make every reasonable attemept to collect this money.