ICD-10-CM > S00-T88 > S00-S09 > S04 > S04.8 S04.8 Injury of other cranial nerves Non-Billable/Non-Specific Codes S04.81Injury of olfactory [1st ] nerveS04.811Injury of olfactory [1st ] nerve, right sideS04.811A..., initial encounterS04.811D..., subsequent encounterS04.811S..., sequelaS04.812Injury of olfactory [1st ] nerve, left sideS04.812A..., initial encounterS04.812D..., subsequent encounterS04.812S..., sequelaS04.819Injury of olfactory [1st ] nerve, unspecified sideS04.819A..., initial encounterS04.819D..., subsequent encounterS04.819S..., sequelaS04.89Injury of other cranial nervesS04.891Injury of other cranial nerves, right sideS04.891A..., initial encounterS04.891D..., subsequent encounterS04.891S..., sequelaS04.892Injury of other cranial nerves, left sideS04.892A..., initial encounterS04.892D..., subsequent encounterS04.892S..., sequelaS04.899Injury of other cranial nerves, unspecified sideS04.899A..., initial encounterS04.899D..., subsequent encounterS04.899S..., sequela