ICD-10-CM > S00-T88 > S40-S49 > S40 > S40.9 > S40.92 S40.92 Unspecified superficial injury of upper arm Non-Billable/Non-Specific Codes S40.921Unspecified superficial injury of right upper armS40.921A..., initial encounterS40.921D..., subsequent encounterS40.921S..., sequelaS40.922Unspecified superficial injury of left upper armS40.922A..., initial encounterS40.922D..., subsequent encounterS40.922S..., sequelaS40.929Unspecified superficial injury of unspecified upper armS40.929A..., initial encounterS40.929D..., subsequent encounterS40.929S..., sequela