Injury of acoustic nerve, left side, sequela

This code signifies a long-term or late effect of an injury to the left acoustic (vestibulocochlear) nerve. This nerve is responsible for transmitting sound and balance information from the inner ear to the brain. The sequela could manifest as persistent hearing loss, tinnitus, or balance disturbances resulting from a past trauma.

Apply this code when documenting a chronic condition or complication directly attributable to a previous injury of the left acoustic nerve, after the acute phase of the injury has passed. Documentation should clearly link the current neurological deficit (e.g., sensorineural hearing loss, vertigo) to a prior traumatic event affecting the acoustic nerve.

• Requires a seventh character 'S' for sequela, indicating a late effect.
• Always sequence the sequela code first, followed by codes for the specific manifestation(s) of the acoustic nerve injury (e.g., H90.52 for left sensorineural hearing loss).
• Ensure documentation specifies "left side" and a clear history of injury to the acoustic nerve.