ICD-10 Code H93.242 – Temporary auditory threshold shift, left ear (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H93.242 – Temporary auditory threshold shift, left ear
What it is
H93.242 identifies a temporary decrease in hearing sensitivity in the left ear. It indicates a reversible threshold shift, often noted after noise exposure or another transient cause.
Clinical signs
You may see muffled hearing, reduced sound clarity, or a patient report of hearing change in the left ear. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record clearly documents a temporary auditory threshold shift limited to the left ear. It fits cases where the provider identifies a transient hearing change rather than permanent hearing loss. Check documentation if the laterality or reversibility is unclear.
Do not use for
Do not use it for permanent hearing loss, unspecified hearing changes, or bilateral threshold shift. If the note does not confirm left-ear involvement, check documentation.
Coding tip
Code only when the chart supports both the temporary nature and left-ear laterality.