ICD-10-CM > S00-T88 > S50-S59 > S55 > S55.9 > S55.90 S55.90 Unspecified injury of unspecified blood vessel at forearm level Non-Billable/Non-Specific Codes S55.901Unspecified injury of unspecified blood vessel at forearm level, right armS55.901A..., initial encounterS55.901D..., subsequent encounterS55.901S..., sequelaS55.902Unspecified injury of unspecified blood vessel at forearm level, left armS55.902A..., initial encounterS55.902D..., subsequent encounterS55.902S..., sequelaS55.909Unspecified injury of unspecified blood vessel at forearm level, unspecified armS55.909A..., initial encounterS55.909D..., subsequent encounterS55.909S..., sequela