ICD-10-CM > S00-T88 > S50-S59 > S55 > S55.0 > S55.00 > S55.009 S55.009 Unspecified injury of ulnar artery at forearm level, unspecified arm Non-Billable/Non-Specific Codes S55.009A..., initial encounterS55.009D..., subsequent encounterS55.009S..., sequela