ICD-10-CM > S00-T88 > S20-S29 > S21 > S21.4 > S21.44 > S21.441 S21.441 Puncture wound with foreign body of right back wall of thorax with penetration into thoracic cavity Non-Billable/Non-Specific Codes S21.441A..., initial encounterS21.441D..., subsequent encounterS21.441S..., sequela