@dazlin I think dealing with billing is one of the hardest parts of cancer. We are so worn out and matching EOBs to hospital bills can be so frustrating. I have found billing people at most helpful in explaining. If you have strait Medicare and no supplement, you owe 80% after a deductible typically. But if you have supplemental or a Medicare advantage plan, it would cover most of that. I'd call billing and ask them to walk you through it. Sometimes you get a bill when your insurance company does, but it is not for payment, just information. Your final bill for payment should show what Medicare paid and what you then owe and it should match the EOB (estimation of benefits) sent by Medicare or your supplemental company. The best advice is to ask a trusted friend or family member to handle this for you so you can not have the added stress. They can sign in to your insurance and/or Medicare and look at everything. Best of luck during this trying time.