ICD-10-CM > S00-T88 > S20-S29 > S21 > S21.3 > S21.33 S21.33 Puncture wound without foreign body of front wall of thorax with penetration into thoracic cavity Non-Billable/Non-Specific Codes S21.331Puncture wound without foreign body of right front wall of thorax with penetration into thoracic cavityS21.331A..., initial encounterS21.331D..., subsequent encounterS21.331S..., sequelaS21.332Puncture wound without foreign body of left front wall of thorax with penetration into thoracic cavityS21.332A..., initial encounterS21.332D..., subsequent encounterS21.332S..., sequelaS21.339Puncture wound without foreign body of unspecified front wall of thorax with penetration into thoracic cavityS21.339A..., initial encounterS21.339D..., subsequent encounterS21.339S..., sequela