Question: I am trying to report code 33210 with code 33235, but Medicare has denied my claim for using an incorrect modifier. Can you please help me? California Subscriber Answer: This is an example of why checking for National Correct Coding Initiative (CCI) edits before submitting any claim is crucial. In this case, code 33210 (Insertion or replacement of temporary transvenous single chamber cardiac electrode or pacemaker catheter (separate procedure)) is a column 2 code for 33235 (Removal of transvenous pacemaker electrode(s); dual lead system). Since this edit has a modifier indicator of “0,” you cannot break it.