CPT® Code 42410

The procedure described by CPT® Code 42410 involves the excision of a tumor located in the lateral lobe of the parotid gland or the removal of the lateral lobe itself, specifically without the dissection of the facial nerve. The parotid gland is the largest of the three major paired salivary glands, situated beneath and in front of the ear. This gland plays a crucial role in saliva production, which aids in digestion and oral health. The surgical approach typically begins with an incision made just anterior to the auricle of the ear, which is then extended around the ear lobe and along the mandible. This incision allows for the elevation of a skin flap, providing access to the parotid gland. During the procedure, careful dissection is performed to separate the inferior aspect of the parotid gland from the sternocleidomastoid muscle, continuing until the digastric muscle is reached. The surgeon meticulously dissects the tissue located anterior to the tip and superior to the tragus to expose the trunk of the facial nerve. The excision of the lateral lobe or the tumor is conducted with precision, ensuring that the facial nerve and its branches are preserved, particularly if deeper dissection is necessary, in which case a nerve stimulator may be utilized to identify these critical structures. Hemostasis is achieved using electrocautery, and a drain is placed through a separate incision behind the ear to facilitate postoperative drainage. Finally, the layers of the platysma muscle, subcutaneous tissue, and skin are closed to complete the procedure. This code is specifically applicable when the excision is performed without nerve dissection, distinguishing it from CPT® Code 42415, which is used when nerve dissection occurs while preserving the facial nerve.