CPT® Code 69725

Decompression of the facial nerve is a surgical procedure aimed at alleviating pressure on the facial nerve, particularly in patients experiencing facial nerve paralysis with deteriorating nerve function. The facial nerve, which is crucial for controlling facial expressions, is anatomically divided into three regions: intracranial, intratemporal, and extratemporal. The intratemporal region specifically begins at the point where the facial nerve enters the internal acoustic meatus and extends to where it exits the stylomastoid foramen. This region encompasses several segments, including the meatal, labyrinthine, tympanic, and vertical segments. In the context of CPT® Code 69725, the procedure involves decompression that extends beyond the geniculate ganglion, which is located within the tympanic segment of the facial nerve. The surgical approach typically involves making an incision behind the ear, followed by a mastoidectomy to gain access to the nerve. The surgeon then exposes the nerve along its vertical segment, removing the bone that covers it using a burr. The tympanic cavity is accessed through the facial recess, allowing for the removal of additional bone over the tympanic segment. The nerve sheath is then incised to relieve pressure on the nerve lateral to the geniculate ganglion. In the case of CPT® Code 69725, the decompression is further extended to a point medial to the geniculate ganglion, ensuring that the nerve is adequately decompressed within the tympanic cavity.