ICD-10-CM > S00-T88 > S20-S29 > S21 > S21.3 > S21.33 > S21.331 S21.331 Puncture wound without foreign body of right front wall of thorax with penetration into thoracic cavity Non-Billable/Non-Specific Codes S21.331A..., initial encounterS21.331D..., subsequent encounterS21.331S..., sequela