ICD-10-CM > S00-T88 > S20-S29 > S20 > S20.4 > S20.40 > S20.401 S20.401 Unspecified superficial injuries of right back wall of thorax Non-Billable/Non-Specific Codes S20.401A..., initial encounterS20.401D..., subsequent encounterS20.401S..., sequela