ICD-10 Code H80.90 – Unspecified Otosclerosis, Unspecified Ear (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H80.90 – Unspecified otosclerosis, unspecified ear
What it is
H80.90 identifies otosclerosis when the affected ear is not specified. This is a condition in which abnormal bone remodeling in the middle ear can interfere with sound transmission.
Clinical signs
Typical findings include progressive conductive hearing loss and, sometimes, tinnitus. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents otosclerosis but does not identify the right or left ear. It also fits cases where the record confirms otosclerosis without laterality. If the note specifies one ear, code the laterality instead.
Do not use for
Do not use this code when the documentation names a specific ear or another cause of hearing loss. Check documentation if the diagnosis is only suspected or not confirmed.
Coding tip
Verify laterality in the assessment, imaging report, or operative note before assigning H80.90.