My physician is an interventional cardiologist who is called in after a diagnostic heart cath by another cardiologist to perform stenting. The cardiologist who performs the left heart cath, coronary angiography and left ventriculogram bills his 93510 while we bill 93508 for the catheter placement during our procedure. We are getting rejections on the 93508 and are trying to determine how to get paid for the catheter placement during our procedure. These are both done on the same day, different physicians, not in the same practice. I realize there are other codes with the heart caths. I am only concernced with the rejection of the 93508.