CPT® Code 69820

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The procedure described by CPT® Code 69820, known as fenestration of the semicircular canal, involves a surgical intervention aimed at addressing issues related to conductive hearing loss. This procedure is characterized by the creation of a small opening, or fenestration, in the lateral semicircular canal, which is part of the inner ear structure. The fenestration is intended to facilitate the transmission of sound waves by bypassing the stapes footplate, a small bone in the middle ear that can become fixed or immobile, thereby impeding normal hearing. The surgical approach typically utilized is a transmastoid approach, which involves accessing the ear through the mastoid bone located behind the ear. During the procedure, a mastoidectomy is performed using a wall down technique, which entails the removal of bone to create a single cavity that encompasses both the mastoid and the ear canal. This technique allows for better visualization and access to the semicircular canal. Once the lateral semicircular canal is identified, the surgeon creates the fenestration and places a fascial graft over the opening to support the structure and promote healing. Although this procedure was more commonly performed in the past, it is now less frequently utilized in contemporary medical practice. The fenestration procedure is sometimes revised, as indicated by CPT® Code 69840, which involves addressing any complications or issues related to a previously performed fenestration.