ICD-10-CM > S00-T88 > S20-S29 > S21 > S21.4 > S21.44 > S21.442 S21.442 Puncture wound with foreign body of left back wall of thorax with penetration into thoracic cavity Non-Billable/Non-Specific Codes S21.442A..., initial encounterS21.442D..., subsequent encounterS21.442S..., sequela