someone who had a med supp and part a only. The med supp would pay part a as usual and 20% of part b claims.
I had a client with Part A only, an employer group plan as secondary to Medicare, and no Part B.
Outpatient claims went to Medicare and were denied. Then they went to the group carrier, which paid the claim AS IF the person had Part B Medicare.
Then he had outpatient surgery.
He was not pleased.