Ankylosis of ear ossicles, right ear

This code signifies the pathological fusion or stiffening of the small bones (malleus, incus, stapes) within the right middle ear. This ankylosis restricts the normal vibratory movement of the ossicles, leading to conductive hearing loss. It can result from various etiologies, including otosclerosis, chronic otitis media, or trauma.

Apply this code when documentation explicitly states ankylosis of the ear ossicles affecting the right ear. This diagnosis is typically supported by audiometric findings demonstrating conductive hearing loss and otoscopic examination or imaging (e.g., CT scan) confirming ossicular fixation.

• Ensure laterality is clearly documented as "right ear" to support this specific code.
• Distinguish from ossicular discontinuity or other middle ear conductive hearing loss causes.
• Code any underlying cause of the ankylosis (e.g., otosclerosis, chronic otitis media) as an additional diagnosis.