ICD-10-CM > S00-T88 > S20-S29 > S20 > S20.4 > S20.45 > S20.451 S20.451 Superficial foreign body of right back wall of thorax Non-Billable/Non-Specific Codes S20.451A..., initial encounterS20.451D..., subsequent encounterS20.451S..., sequela