Linn - I agree that he was admitted. That is the criterion that Medicare requires. So get written proof of that from the hospital - should be on the bill - and if Jeri and I are reading the info correctly, Tom should not have to pay a copay.
That is probably the cause of the misinformation. Kath Westra pointed out that that is often the reason for an initial refusal by Medicare to cover 100% of the nursing home. Call SHIP. Find out what forms you have to file and be prepared to fight the copay charge.

Maybe this is just a bad time to try to deal with this. Relax. Take care of Tom. Worry about the rest if and when the bills come.