ICD-10 Code H90.A3 – Mixed conductive and sensorineural hearing loss, unilateral with restricted hearing on the contralateral side (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H90.A3 – Mixed conductive and sensorineural hearing loss, unilateral with restricted hearing on the contralateral side
What it is
This code identifies hearing loss in one ear that has both conductive and sensorineural components, while the other ear has restricted hearing. Use it when documentation clearly describes this unilateral pattern.
Clinical signs
Findings may include reduced hearing on one side, abnormal audiology testing, and evidence of both middle-ear and inner-ear involvement. Clinical features vary; refer to documentation.
When to use this code
Use H90.A3 when the record states mixed hearing loss affects one ear and the opposite ear also has restricted hearing. It fits audiology or specialist documentation that distinguishes unilateral mixed loss from bilateral or unspecified hearing loss. Check documentation if laterality is unclear.
Do not use for
Do not use this code for isolated conductive hearing loss, isolated sensorineural hearing loss, or bilateral mixed hearing loss. Also avoid it when the chart does not confirm contralateral restricted hearing.
Coding tip
Confirm both the mixed loss and the contralateral restriction before assigning H90.A3.