ICD-10-CM > S00-T88 > S20-S29 > S21 > S21.3 > S21.35 > S21.351 S21.351 Open bite of right front wall of thorax with penetration into thoracic cavity Non-Billable/Non-Specific Codes S21.351A..., initial encounterS21.351D..., subsequent encounterS21.351S..., sequela