ICD-10-CM > S00-T88 > S50-S59 > S55 > S55.9 > S55.99 S55.99 Other specified injury of unspecified blood vessel at forearm level Non-Billable/Non-Specific Codes S55.991Other specified injury of unspecified blood vessel at forearm level, right armS55.991A..., initial encounterS55.991D..., subsequent encounterS55.991S..., sequelaS55.992Other specified injury of unspecified blood vessel at forearm level, left armS55.992A..., initial encounterS55.992D..., subsequent encounterS55.992S..., sequelaS55.999Other specified injury of unspecified blood vessel at forearm level, unspecified armS55.999A..., initial encounterS55.999D..., subsequent encounterS55.999S..., sequela