Injury of acoustic nerve, left side, subsequent encounter

This code signifies damage to the left acoustic (vestibulocochlear) nerve, which is responsible for transmitting sound and balance information from the inner ear to the brain. This injury can result in hearing loss, tinnitus, vertigo, or balance disturbances affecting the left ear.

Apply this code for follow-up care of a previously diagnosed left acoustic nerve injury, such as during rehabilitation, medication management for persistent symptoms, or monitoring for complications. Documentation should clearly indicate the left side affected and that the patient is in the healing or recovery phase, not the initial treatment.

• Ensure documentation specifies "left side" and "subsequent encounter" for accurate code assignment.
• Distinguish from initial encounter codes (e.g., those ending in 'A') and sequela codes (e.g., those ending in 'S').
• Code any associated symptoms (e.g., H90.32 for sensorineural hearing loss, left ear) as secondary diagnoses.