ICD-10 Code H91.0 – Ototoxic hearing loss (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H91.0 – Ototoxic hearing loss
What it is
H91.0 identifies hearing loss caused by exposure to ototoxic substances, such as certain medications or chemicals. Use it when the record links the hearing impairment to a toxic effect on the ear.
Clinical signs
Clinical features vary; refer to documentation. Typical findings include new or worsening sensorineural hearing loss, often after exposure to a known ototoxic agent, with possible tinnitus or difficulty understanding speech.
When to use this code
Use H91.0 when the clinician documents ototoxic hearing loss or clearly attributes hearing loss to a toxic exposure. It may apply when the cause is a medication or chemical effect on hearing. If the chart does not specify ototoxicity, check documentation before coding.
Do not use for
Do not use this code for unspecified hearing loss or hearing loss from infection, trauma, or congenital causes. If the record does not link the condition to an ototoxic agent, this code is not appropriate.
Coding tip
Look for the causal agent in the note; H91.0 needs documented ototoxic etiology, not just hearing loss alone.