ICD-10-CM > S00-T88 > S20-S29 > S21 > S21.3 > S21.31 S21.31 Laceration without foreign body of front wall of thorax with penetration into thoracic cavity Non-Billable/Non-Specific Codes S21.311Laceration without foreign body of right front wall of thorax with penetration into thoracic cavityS21.311A..., initial encounterS21.311D..., subsequent encounterS21.311S..., sequelaS21.312Laceration without foreign body of left front wall of thorax with penetration into thoracic cavityS21.312A..., initial encounterS21.312D..., subsequent encounterS21.312S..., sequelaS21.319Laceration without foreign body of unspecified front wall of thorax with penetration into thoracic cavityS21.319A..., initial encounterS21.319D..., subsequent encounterS21.319S..., sequela