CPT® Code 33264

Removal of implantable defibrillator pulse generator with replacement of implantable defibrillator pulse generator; multiple lead system

The procedure described by CPT® Code 33264 involves the removal and replacement of an implantable defibrillator pulse generator, specifically within a multiple lead system. An implantable defibrillator, also known as an automatic implantable cardioverter-defibrillator (AICD or ICD), is a medical device designed to monitor the heart's electrical activity continuously. It plays a critical role in managing life-threatening arrhythmias by providing various therapeutic interventions. These include anti-tachycardia pacing, which helps prevent rapid irregular heart rhythms; backup pacing to maintain a stable heart rhythm; cardioversion, which delivers a mild shock to restore a normal heart rhythm; and defibrillation, which administers a stronger shock to correct dangerously abnormal rhythms or to restart the heart during cardiac arrest. During this procedure, the physician first opens the skin pocket where the existing pulse generator is located and carefully removes it. The new pulse generator is then connected to the existing leads, which are the wires that deliver electrical impulses to the heart. After ensuring that the new generator and leads are functioning correctly through testing, the new pulse generator is placed back into the pocket, secured to the underlying tissue, and the pocket is subsequently closed. This procedure is essential for patients whose existing defibrillator is malfunctioning or whose generator battery is nearing the end of its life, ensuring continued monitoring and management of their heart condition.