ICD-10 Code H90.A12 – Conductive hearing loss, unilateral, left ear with restricted hearing on the contralateral side (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H90.A12 – Conductive hearing loss, unilateral, left ear with restricted hearing on the contralateral side
What it is
This code identifies conductive hearing loss affecting the left ear, with limited hearing in the opposite ear. Use it when the record clearly states unilateral left conductive loss and reduced hearing on the contralateral side.
Clinical signs
Typical findings include reduced sound conduction in one ear and measurable hearing limitation in the other. Clinical features vary; refer to documentation and audiologic testing when available.
When to use this code
Use this code when the provider documents left-sided conductive hearing loss plus restricted hearing in the other ear. It may appear in audiology, ENT, or problem-list documentation. Verify laterality and the contralateral hearing status before coding.
Do not use for
Do not use it for unspecified hearing loss, sensorineural loss, or conductive loss without the documented left-sided and contralateral details. Check documentation if the ear side or hearing restriction is unclear.
Coding tip
Confirm both laterality and the contralateral hearing restriction in the chart before assigning H90.A12.