How would you bill for a selective renal angiogram done at the time of a diagnostic heart cath? From what I understand the interpertation of the selective renal angiogram needs to be as complete a study as if it had been done alone. I have a report where our physician says he did bilateral selective renal angiogram during cath but under the renal artery angiography part it just says no renal artery stenosis. I thought that there had to be a venous phase interpertation and everything. I would appreciate any help as this has been an on going issue. I don't want to be missing services but I don't want to be billing for things that the documentation does not support either. Thanks shelly