H90.42
ICD-10-CMSensorineural hearing loss, unilateral, left ear, with unrestricted hearing on the contralateral side
This code signifies a type of hearing loss originating from damage to the inner ear or auditory nerve, specifically affecting only the left ear. The patient retains normal hearing function in their right ear, indicating the condition is unilateral with a healthy contralateral side. This distinguishes it from conductive hearing loss or bilateral sensorineural deficits.
Apply this code when documentation clearly states a diagnosis of sensorineural hearing loss localized to the left ear, with explicit confirmation of normal hearing in the right ear. This is typically supported by audiometry results showing a sensorineural deficit in the left ear and normal thresholds in the right. Use for patients presenting with unilateral hearing complaints where inner ear pathology is identified.
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