ICD-10-CM > S00-T88 > S60-S69 > S64 > S64.8 > S64.8X > S64.8X9 S64.8X9 Injury of other nerves at wrist and hand level of unspecified arm Non-Billable/Non-Specific Codes S64.8X9A..., initial encounterS64.8X9D..., subsequent encounterS64.8X9S..., sequela