Ask Dr. Z

I'm new to carotid angiogram and wondering which CPT code (36222 or 36223) is correct for this case. 

"Catheter advanced to the ascending aorta to right brachiocephalic then right common carotid artery engaged. Multiple views of right carotid system then catheter pulled back to brachiocephalic. A brachiocephalic angiogram performed. The catheter pulled back and engage left subclavian. The catheter used to engage the left common carotid artery with multiple views. Finding state left carotid artery is normal and bifurcates into the internal and external carotid artery. External carotid normal and internal reveals 90% focal stenosis."