ICD-10-CM > S00-T88 > S00-S09 > S04 > S04.8 > S04.81 > S04.811 S04.811 Injury of olfactory [1st ] nerve, right side Non-Billable/Non-Specific Codes S04.811A..., initial encounterS04.811D..., subsequent encounterS04.811S..., sequela