ICD-10-CM > S00-T88 > S60-S69 > S64 > S64.0 > S64.00 S64.00 Injury of ulnar nerve at wrist and hand level of unspecified arm Non-Billable/Non-Specific Codes S64.00XA..., initial encounterS64.00XD..., subsequent encounterS64.00XS..., sequela