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