59 Modifier

I work for an ophthalmologist and he did a cataract surgery on a patient and he also did lysis of adhesions. We billed the cataract surgery with code 66984-LT and the lysis of adhesions was billed with 65875-59-LT. We are billing a medicare replacement policy and they are denying the 65875-59-LT as part of the primary procedure. I know that Medicare does allow this, but is there anything I can do besides appealing to get this covered?