ICD-10-CM > S00-T88 > S20-S29 > S20 > S20.4 > S20.41 > S20.412 S20.412 Abrasion of left back wall of thorax Non-Billable/Non-Specific Codes S20.412A..., initial encounterS20.412D..., subsequent encounterS20.412S..., sequela