ICD-10-CM > S00-T88 > S20-S29 > S21 > S21.2 > S21.22 > S21.221 S21.221 Laceration with foreign body of right back wall of thorax without penetration into thoracic cavity Non-Billable/Non-Specific Codes S21.221A..., initial encounterS21.221D..., subsequent encounterS21.221S..., sequela