anyone w/knowledge of Medicare???

[mrlynn]

What MichaelB said. I was assuming that by 'supplemental' you meant 'supplemental', like BCBS Medex. But, come to think of it, I don't recall any others except one from United Healthcare, at least here in Massachusetts. If this KHPE is a Medicare Advantage plan, then they would get only one bill and EOB. Best to have a look at their cards, and if necessary, call the carriers—and then the hospital, if there's still a question.

/Mr Lynn