CPT® Code 33249

The procedure described by CPT® Code 33249 involves the insertion or replacement of a permanent implantable defibrillator system, which includes one or more transvenous leads. This system is designed for either a single or dual chamber configuration. The device, commonly known as an automatic implantable cardioverter-defibrillator (AICD or ICD), plays a critical role in monitoring the heart's electrical activity continuously. It is equipped to provide various therapeutic functions, including anti-tachycardia pacing (ATP) to prevent rapid and irregular heart rhythms, backup pacing to maintain a stable heart rhythm, and cardioversion, which uses a mild shock to restore a normal heart rhythm from an abnormal one. In more severe cases, the device can deliver defibrillation, a stronger shock intended to convert dangerously abnormal heart rhythms or to restore a heartbeat during cardiac arrest. The procedure requires a surgical incision in the upper chest area, where access to the cephalic, subclavian, or jugular vein is achieved. Through this access point, a sheath is inserted into the selected vein, allowing for the advancement of the AICD lead into the appropriate heart chamber under radiological guidance. The lead is carefully positioned against the chamber wall, and if a dual chamber device is indicated, a second lead is similarly placed. Following the positioning of the leads, they are tested to ensure proper functionality. Subsequently, a subcutaneous pocket is created in the left pectoral region for the pulse generator, which is then connected to the leads and tested for operational integrity before final placement and closure of the incision.