CPT® Code 61458

CPT® Code 61458 refers to a surgical procedure known as a suboccipital craniectomy, which is performed for the exploration or decompression of cranial nerves. This procedure is indicated when cranial nerves experience compression due to blood vessels crossing over them, leading to various neurological symptoms. The specific symptoms can vary based on which cranial nerves are affected; for instance, compression of the vestibular nerve may result in vertigo, while compression of the cochlear nerve can lead to tinnitus, characterized by ringing or other noises in the ears. During the procedure, the patient is positioned supine, and their head is stabilized using a Mayfield clamp. The surgical approach involves making a curvilinear incision behind the ear, ensuring careful avoidance of the greater and lesser occipital nerves. A small section of bone is then removed to access the cranial cavity, allowing for the dura mater to be incised and the posterior fossa to be decompressed. The procedure is typically performed with the assistance of an operating microscope, which enhances the surgeon's ability to visualize the cranial nerves. Microvascular decompression is achieved by placing small synthetic sponges between the compressing blood vessels and the affected nerves, thereby alleviating the pressure. This procedure is distinct from cranial nerve sectioning, which is indicated for more severe conditions such as Meniere's disease or vestibular neuritis. After the decompression or sectioning is completed, the dura is reapproximated, and the surgical site is meticulously closed in layers to promote healing.