CPT® Code 33279

Removal of phrenic nerve stimulator, including vessel catheterization, all imaging guidance, and interrogation and programming, when performed; transvenous stimulation or sensing lead(s) only

The procedure described by CPT® Code 33279 involves the removal of a phrenic nerve stimulator system, which is specifically utilized in the treatment of central sleep apnea (CSA). This procedure is complex due to the typical patient profile, which often includes individuals with heart failure and reduced ejection fraction. The leads of the stimulator are usually positioned in critical vascular structures such as the brachiocephalic or pericardiophrenic vein, which increases the risk of potential vascular or cardiac damage during the removal process. The neurostimulator system itself comprises an implantable pulse generator, a stimulation lead, and, in some cases, a pressure-sensing lead that may be located in the azygos vein. The removal procedure is performed under general anesthesia to ensure patient comfort and safety. It typically involves the extraction of the pulse generator along with one lead, although instances of removing only a lead or solely the generator are rare. The removal of the generator may be indicated prior to other treatments, such as radiation therapy, while a lead may need to be extracted if it is infected or cannot be removed simultaneously with the pulse generator. The surgical approach begins with establishing the position of the pulse generator, followed by making an incision to access the previously implanted device located in its subcutaneous pocket. The generator and lead(s) are meticulously freed from the surrounding tissue to facilitate their removal. This procedure requires careful handling to avoid complications and ensure the safety of the patient throughout the process.