ICD-10-CM > S00-T88 > S00-S09 > S04 > S04.7 S04.7 Injury of accessory nerve Non-Billable/Non-Specific Applicable To Injury of 11th cranial nerve Codes S04.70Injury of accessory nerve, unspecified sideS04.70XA..., initial encounterS04.70XD..., subsequent encounterS04.70XS..., sequelaS04.71Injury of accessory nerve, right sideS04.71XA..., initial encounterS04.71XD..., subsequent encounterS04.71XS..., sequelaS04.72Injury of accessory nerve, left sideS04.72XA..., initial encounterS04.72XD..., subsequent encounterS04.72XS..., sequela