CPT® Code 69720

Decompression of the facial nerve, specifically coded as CPT® 69720, is a surgical procedure aimed at alleviating pressure on the facial nerve in patients experiencing facial nerve paralysis with deteriorating nerve function. The facial nerve is anatomically divided into three distinct regions: intracranial, intratemporal, and extratemporal. The intratemporal region is particularly significant as it begins at the point where the facial nerve enters the internal acoustic meatus and extends to where it exits through the stylomastoid foramen. Within this intratemporal segment, the facial nerve comprises several important sections, including the meatal, labyrinthine, tympanic, and vertical segments. The procedure described by CPT® 69720 specifically targets the area lateral to the geniculate ganglion, which is located within the tympanic segment of the facial nerve. To access the nerve, a surgical incision is typically made behind the ear, followed by a mastoidectomy to facilitate exposure of the nerve along its vertical segment up to the stylomastoid foramen. During the procedure, the surgeon removes the bone overlying the nerve using a burr, approaches the tympanic cavity through the facial recess, and further removes bone covering the tympanic segment. The nerve sheath is then carefully incised to decompress the facial nerve lateral to the geniculate ganglion, thereby relieving pressure and potentially restoring function. This procedure is critical for patients whose facial nerve function is compromised, providing a pathway for recovery and improved quality of life.