Injury of acoustic nerve, unspecified side, subs encntr

This code signifies an injury to the acoustic (vestibulocochlear) nerve, which is responsible for hearing and balance, occurring during a subsequent encounter for care. It indicates that the specific side of the injury (left or right) was not documented by the provider. This diagnosis often results in symptoms such as hearing loss, tinnitus, vertigo, or balance disturbances.

Use this code for follow-up visits, rehabilitation, or ongoing management of an acoustic nerve injury after the initial treatment phase. Documentation should clearly state "acoustic nerve injury" and indicate that the encounter is not the initial treatment for the injury. This code is appropriate when the medical record does not specify whether the injury is to the left or right acoustic nerve.

• Ensure the "D" seventh character for "subsequent encounter" is appropriate for the patient's current phase of treatment.
• Avoid using this code if the laterality of the acoustic nerve injury (left or right) is documented; instead, select the more specific S04.61- or S04.62- codes.
• Always review the medical record for the initial cause of the injury, as an external cause code (V, W, X, Y category) may also be required.