ICD-10 Code H80.03 – Otosclerosis involving oval window, nonobliterative, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H80.03 – Otosclerosis involving oval window, nonobliterative, bilateral
What it is
This code identifies bilateral otosclerosis affecting the oval window without complete bony fixation. It describes a middle ear condition that can limit sound transmission and contribute to conductive hearing loss.
Clinical signs
Typical findings include progressive hearing loss in both ears, often with a conductive pattern. Tinnitus may be present; clinical features vary, so refer to documentation for the documented extent and laterality.
When to use this code
Use H80.03 when the provider documents otosclerosis involving the oval window, nonobliterative, and specifies that both ears are affected. Apply it when the record clearly distinguishes this subtype from other otosclerosis forms. If laterality or subtype is not documented, check documentation before coding.
Do not use for
Do not use this code for unilateral otosclerosis, obliterative disease, or otosclerosis not involving the oval window. It is also inappropriate when the diagnosis is only suspected or not fully documented.
Coding tip
Confirm both laterality and the nonobliterative oval-window wording in the provider note before assigning H80.03.