ICD-10-CM > S00-T88 > S20-S29 > S20 > S20.3 > S20.31 > S20.313 S20.313 Abrasion of bilateral front wall of thorax Non-Billable/Non-Specific Codes S20.313A..., initial encounterS20.313D..., subsequent encounterS20.313S..., sequela