ICD-10-CM > S00-T88 > S80-S89 > S84 > S84.9 S84.9 Injury of unspecified nerve at lower leg level Non-Billable/Non-Specific Codes S84.90Injury of unspecified nerve at lower leg level, unspecified legS84.90XA..., initial encounterS84.90XD..., subsequent encounterS84.90XS..., sequelaS84.91Injury of unspecified nerve at lower leg level, right legS84.91XA..., initial encounterS84.91XD..., subsequent encounterS84.91XS..., sequelaS84.92Injury of unspecified nerve at lower leg level, left legS84.92XA..., initial encounterS84.92XD..., subsequent encounterS84.92XS..., sequela