ICD-10 Code H74.311 – Ankylosis of ear ossicles, right ear (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H74.311 – Ankylosis of ear ossicles, right ear
What it is
H74.311 identifies abnormal fixation of the middle-ear ossicles in the right ear. This limits normal sound transmission and can contribute to conductive hearing loss.
Clinical signs
Findings often include unilateral conductive hearing loss, reduced hearing on audiology testing, and abnormal middle-ear mobility on examination. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record specifically documents ankylosis or fixation of the ear ossicles in the right ear. It may be supported by otologic evaluation, audiometry, or operative findings. Code it only when the laterality is clearly stated.
Do not use for
Do not use it for nonspecific hearing loss without documented ossicular fixation. Avoid this code when the condition is in the left ear, both ears, or when documentation only says otosclerosis or middle-ear disease. Check documentation.
Coding tip
Confirm right-sided laterality and documented ossicular ankylosis before assigning H74.311.