CPT® Code 69666

The procedure described by CPT® Code 69666 involves the surgical repair of a fistula located in the oval window, which is a critical structure in the inner ear. A fistula is defined as an abnormal connection or passage that forms between the middle ear and the inner ear, potentially leading to various auditory and balance issues. The oval window itself is a membrane-covered opening that connects the middle ear to the inner ear, playing a vital role in the transmission of sound vibrations. During the procedure, the physician makes an incision in the posterior wall of the ear canal to access the affected area. A tympanomeatal flap, which is a section of the ear canal skin and underlying tissue, is carefully elevated to expose the oval window. The repair of the fistula is performed using a graft, typically derived from mesodermal or other soft tissue, to ensure proper closure and restoration of normal ear function. After the repair is completed, the tympanomeatal flap is repositioned, and the incision in the meatus is meticulously closed with sutures to promote healing and minimize complications.