What are three items that medicare beneficiaries are responsible for paying before medicare will begin to pay for services?

This refers to Medicare premium payments that were automatically taken out of your paychecks during the year. They should be listed on your W-2.

not if you inform them you can't afford a medicare supplement @ this time. Send 2 registered letter's with a return receipt for proof

Medicare would have covered all the remainder if my insurance had not made the error

"Can they rebill medicare again I received a bill from the hospital almost 2 years after spouses death because insurance company made a mistake am I responsible because medicare should pay rest?"

No, Medicare is a Fee For Service Program, but doctors must contract with Medicare to treat Medicare patients