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