Transient ischemic deafness, left ear

This code describes a temporary episode of hearing loss affecting the left ear, resulting from a transient reduction in blood flow to the auditory system. It implies a sudden onset of sensorineural hearing loss that fully or partially resolves within a short period, typically 24 hours, without evidence of permanent damage.

Use this code when documentation indicates a patient experienced a sudden, temporary decrease in hearing in the left ear attributed to an ischemic event, such as a transient ischemic attack (TIA) affecting the vertebrobasilar system. Supporting documentation should specify the laterality (left ear) and the transient nature of the hearing loss.

• Differentiate from sudden sensorineural hearing loss (SSNHL) of unknown etiology, which is typically permanent.
• Ensure documentation clearly states "transient" or "ischemic" and specifies the left ear.
• Consider co-reporting with codes for underlying cerebrovascular conditions if documented.