ICD-10-CM > S00-T88 > S80-S89 > S84 > S84.9 > S84.91 S84.91 Injury of unspecified nerve at lower leg level, right leg Non-Billable/Non-Specific Codes S84.91XA..., initial encounterS84.91XD..., subsequent encounterS84.91XS..., sequela