ICD-10 Code H90.12 – Conductive hearing loss, unilateral, left ear, with unrestricted hearing on the contralateral side (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H90.12 – Conductive hearing loss, unilateral, left ear, with unrestricted hearing on the contralateral side
What it is
H90.12 identifies conductive hearing loss affecting the left ear only, while the right ear has normal hearing. The problem lies in sound transmission through the outer or middle ear, not the inner ear.
Clinical signs
You may see reduced hearing on the left, difficulty understanding speech, or a history of ear disease, blockage, or injury. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record clearly states unilateral conductive hearing loss in the left ear and notes normal hearing in the opposite ear. It also fits audiology or ENT documentation that localizes the deficit to the left side. Check documentation if laterality or type is unclear.
Do not use for
Do not use it for sensorineural or mixed hearing loss, bilateral hearing loss, or unspecified laterality. If the chart does not confirm conductive loss or left-sided involvement, choose a more accurate code.
Coding tip
Confirm both laterality and hearing type in the note before coding H90.12.