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