Ask Dr. Z

Hi, I am seeking clarification on the scenario of retrograde right common carotid origin stenting (with endarterectomy of right internal carotid artery just distal to the bulb). Due to anatomical considerations, I see that the distal left common carotid/left common carotid origin would be intrathoracic. However, with the right common carotid origin being behind the sternoclavicular joint, as this is the junction between the neck and the thorax, I am uncertain if this would be considered intrathoracic or cervical. Could you please verify if stent code assignment for the scenario of retrograde right common carotid origin/right proximal common carotid stenting done concurrently with right internal carotid endarterectomy would be 37217, or 37215/6? Thanks