ICD-10 Code H90.4 – Sensorineural hearing loss, unilateral with unrestricted hearing on the contralateral side (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H90.4 – Sensorineural hearing loss, unilateral with unrestricted hearing on the contralateral side
What it is
This code identifies sensorineural hearing loss affecting one ear while hearing in the other ear remains unrestricted. It reflects inner ear or auditory nerve dysfunction on the affected side.
Clinical signs
Typical findings include reduced hearing sensitivity in one ear, difficulty localizing sound, and trouble understanding speech in noisy settings. Clinical features vary; refer to documentation.
When to use this code
Use H90.4 when the record clearly documents unilateral sensorineural hearing loss and the opposite ear has normal or unrestricted hearing. Apply it when the provider specifies the type as sensorineural rather than conductive or mixed. If laterality or hearing status is unclear, check documentation.
Do not use for
Do not use this code for bilateral hearing loss or for conductive hearing loss. Avoid it when the chart does not confirm sensorineural involvement or the contralateral ear status is not documented.
Coding tip
Confirm both laterality and hearing type in the note before assigning H90.4.