ICD-10-CM > S00-T88 > S50-S59 > S55 > S55.0 > S55.00 S55.00 Unspecified injury of ulnar artery at forearm level Non-Billable/Non-Specific Codes S55.001Unspecified injury of ulnar artery at forearm level, right armS55.001A..., initial encounterS55.001D..., subsequent encounterS55.001S..., sequelaS55.002Unspecified injury of ulnar artery at forearm level, left armS55.002A..., initial encounterS55.002D..., subsequent encounterS55.002S..., sequelaS55.009Unspecified injury of ulnar artery at forearm level, unspecified armS55.009A..., initial encounterS55.009D..., subsequent encounterS55.009S..., sequela