hello all. I am wondering if anyone can help me code a rather strange scenario. Pt had a heart cath on 3.31.11 and they went back and did ONLY the FFR on 4.7.11. the FFR is an add on code to a cath or intervention so can or how would I bill 93571 without a primary code? They were going to do the FFR and then intervene if necessary but the lesion was not bad enough to need intervention. Any suggestions/ideas would be greatly appreciated!

Thank you