ICD-10-CM > S00-T88 > S60-S69 > S64 > S64.9 S64.9 Injury of unspecified nerve at wrist and hand level Non-Billable/Non-Specific Codes S64.90Injury of unspecified nerve at wrist and hand level of unspecified armS64.90XA..., initial encounterS64.90XD..., subsequent encounterS64.90XS..., sequelaS64.91Injury of unspecified nerve at wrist and hand level of right armS64.91XA..., initial encounterS64.91XD..., subsequent encounterS64.91XS..., sequelaS64.92Injury of unspecified nerve at wrist and hand level of left armS64.92XA..., initial encounterS64.92XD..., subsequent encounterS64.92XS..., sequela