Injury of unspecified cranial nerve, initial encounter

This code signifies an injury to any of the twelve cranial nerves where the specific nerve affected is not documented. It indicates trauma to a cranial nerve resulting in functional impairment, such as sensory deficits, motor weakness, or autonomic dysfunction. This code is used when the patient is in the active treatment phase of the injury.

Use this code when documentation clearly states a cranial nerve injury has occurred, but the specific nerve (e.g., optic, facial, vagus) is not identified. This is appropriate for initial evaluations in the emergency department or during the acute phase of treatment following trauma. Supporting documentation would include physician notes detailing a cranial nerve deficit without further specificity.

• Avoid using this code if a more specific cranial nerve injury (e.g., S04.0XXA for optic nerve) can be identified from the documentation.
• Ensure the "A" seventh character is appropriate for the initial encounter; subsequent encounters will require different seventh characters.
• Always query the provider for greater specificity regarding the injured cranial nerve if possible, to allow for more precise coding.