CPT® Code 61791

Creation of lesion by stereotactic method, percutaneous, by neurolytic agent (eg, alcohol, thermal, electrical, radiofrequency); trigeminal medullary tract

The CPT® Code 61791 refers to the creation of a lesion using a stereotactic method, specifically targeting the trigeminal medullary tract. This procedure involves the precise placement of a neurolytic agent, which may include substances such as alcohol, or the application of thermal, electrical, or radiofrequency energy to destroy targeted nerve tissue. The process begins with the attachment of a specialized frame to the patient's skull, which serves as a reference point for accurate positioning. Advanced imaging techniques, such as MRI or CT scans, are utilized to map the anatomical structures and identify the exact location of the lesions within the gasserian ganglion or trigeminal medullary tract. The procedure can be performed using a needle or probe apparatus that is aligned with the predetermined coordinates obtained from the imaging studies. In some cases, frameless stereotactic surgery may be employed, utilizing fiduciary markers for guidance. The needle or probe is then carefully advanced through the skin to the designated area, where the lesion is created. Depending on the method chosen, a neurolytic agent may be injected, or an electric or radiofrequency probe may be activated to ablate the targeted tissue. It is important to note that CPT® Code 61790 is designated for the creation of lesions in the gasserian ganglion, while CPT® Code 61791 is specifically for lesions in the trigeminal medullary tract.