ICD-10-CM > S00-T88 > S20-S29 > S20 > S20.3 > S20.31 > S20.312 S20.312 Abrasion of left front wall of thorax Non-Billable/Non-Specific Codes S20.312A..., initial encounterS20.312D..., subsequent encounterS20.312S..., sequela