ICD-10-CM > S00-T88 > S20-S29 > S20 > S20.3 > S20.30 > S20.309 S20.309 Unspecified superficial injuries of unspecified front wall of thorax Non-Billable/Non-Specific Codes S20.309A..., initial encounterS20.309D..., subsequent encounterS20.309S..., sequela