ICD-10 Code H80.20 – Cochlear otosclerosis, unspecified ear (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H80.20 – Cochlear otosclerosis, unspecified ear
What it is
H80.20 identifies cochlear otosclerosis affecting an unspecified ear. It refers to abnormal bone remodeling around the cochlea that can contribute to hearing loss.
Clinical signs
Clinical features vary; refer to documentation. Common findings include progressive hearing loss, often sensorineural or mixed, and audiology evidence supporting cochlear involvement.
When to use this code
Use this code when the provider documents cochlear otosclerosis but does not specify right or left ear. It is also appropriate when the record clearly supports cochlear otosclerosis and the ear laterality is not stated. Check documentation if the note only says otosclerosis without cochlear involvement.
Do not use for
Do not use this code for conductive otosclerosis without cochlear involvement or when a different ear is specified. If the diagnosis is uncertain, code the documented condition only.
Coding tip
Confirm both cochlear involvement and unspecified laterality before assigning H80.20.