ICD-10 Code H80.01 – Otosclerosis involving oval window, nonobliterative, right ear (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H80.01 – Otosclerosis involving oval window, nonobliterative, right ear
What it is
Use this code for otosclerosis affecting the oval window in the right ear, with the stapes footplate not fully fixed. It describes a conductive hearing disorder limited to the right side.
Clinical signs
Typical documentation includes progressive conductive hearing loss, often with normal tympanic membrane findings. Clinical features vary; refer to documentation for laterality and whether the process is nonobliterative.
When to use this code
Assign H80.01 when the record states right-sided otosclerosis involving the oval window and specifically identifies the nonobliterative form. Use it for confirmed diagnoses, audiology or otologic assessments, and specialist notes that document laterality. Check documentation if the ear or subtype is not clearly specified.
Do not use for
Do not use this code for unspecified otosclerosis, left ear, bilateral disease, or obliterative otosclerosis. Do not use it when documentation only mentions hearing loss without a confirmed otosclerosis diagnosis.
Coding tip
Verify both laterality and the nonobliterative subtype before assigning H80.01.