CPT® Code 33280

Removal of phrenic nerve stimulator, including vessel catheterization, all imaging guidance, and interrogation and programming, when performed; pulse generator only

The procedure described by CPT® Code 33280 involves the removal of a phrenic nerve stimulator, specifically focusing on the pulse generator component of the neurostimulator system. This system is primarily utilized in the treatment of central sleep apnea (CSA), a condition that can significantly impact a patient's quality of life. The removal process is intricate due to the typical patient profile, which often includes individuals with heart failure and reduced ejection fraction. These patients may have leads positioned in critical vascular structures such as the brachiocephalic or pericardiophrenic vein, which heightens the risk of vascular or cardiac complications during the procedure. The neurostimulator system itself comprises an implantable pulse generator, a stimulation lead, and occasionally a pressure-sensing lead located in the azygos vein. The removal of the pulse generator is generally performed under general anesthesia, and it may involve the extraction of one lead as well. While it is uncommon to remove only a lead or only the generator, there are specific circumstances where this may occur. For instance, a generator may be extracted prior to other treatments like radiation therapy, while a lead may need to be removed if it becomes infected or cannot be extracted simultaneously with the pulse generator. During the procedure, the surgeon establishes the position of the pulse generator and makes an incision to access the device, which is typically located in a subcutaneous pocket. The generator and any attached lead(s) are meticulously freed from the surrounding tissue, and the leads are disconnected from the generator. If necessary, a stylet or stiff guidewire is utilized under fluoroscopic guidance to facilitate the removal of the lead. In cases where the lead is not easily removable, advanced techniques such as the use of a locking stylet and a manual rotational extractor or laser sheath may be employed. The procedure concludes with the removal of the generator and lead(s), ensuring hemodynamic stability before closing the incision. If only the pulse generator is removed, any abandoned lead(s) are left in place, while the removal of a lead involves similar careful disconnection and extraction techniques.