Ototoxic hearing loss, left ear

This code signifies hearing loss in the left ear that is directly attributable to exposure to ototoxic substances. These substances can damage the inner ear, leading to sensorineural hearing impairment. The hearing loss can be temporary or permanent, depending on the substance, dosage, and duration of exposure.

Assign this code when documentation clearly indicates a diagnosis of hearing loss in the left ear caused by ototoxic medications, chemicals, or other agents. Supporting documentation should specify the laterality (left ear) and the causal link to an ototoxic exposure. This code is appropriate when the provider has explicitly identified the ototoxic etiology.

• Ensure the documentation specifies "left ear" for laterality; otherwise, an unspecified laterality code may be more appropriate.
• Always look for an additional code to identify the specific ototoxic agent, if known (e.g., T36-T65 for poisoning by drugs, medicaments, and biological substances).
• Differentiate from other types of sensorineural hearing loss where an ototoxic cause is not documented or suspected.