CPT® Code 69530

The CPT® Code 69530 refers to a surgical procedure known as petrous apicectomy, which is performed in conjunction with a radical mastoidectomy. This complex operation is primarily indicated for patients suffering from infections that have progressed from the mastoid air cells to the petrous apex, a critical area located at the base of the skull. The procedure begins with an incision made behind the ear, allowing the surgeon to access the mastoid bone. Once exposed, the mastoid bone is carefully opened to facilitate the complete removal of the air cell system, which may be filled with purulent matter, debris, and infected tissue. This thorough debridement is essential to eliminate the source of infection and prevent further complications. During the procedure, important anatomical structures within the epitympanum, including the head of the malleus and the body of the incus, are also excised. While the stapes may be removed, efforts are made to preserve it whenever possible, as its removal can impact hearing. The surgical approach allows for the exteriorization of the mastoid cavity and the middle ear, which is crucial for effective drainage and healing. To access the petrous apex, the anterior wall of the ear canal is removed, and in some cases, the condyle of the mandible may be excised to provide better visibility and access. The tensor muscle of the tympanic membrane is avulsed, and the tensor semicanal is opened to facilitate the dissection of the triangle formed by the carotid artery, cochlea, and middle fossa dura. Ultimately, the petrous apex is visualized and excised, and a drain may be placed to ensure continued drainage of any residual fluid or infection.