ICD-10-CM > S00-T88 > S20-S29 > S20 > S20.3 > S20.30 > S20.304 S20.304 Unspecified superficial injuries of middle front wall of thorax Non-Billable/Non-Specific Codes S20.304A..., initial encounterS20.304D..., subsequent encounterS20.304S..., sequela