Open bite of unspecified back wall of thorax with penetration into thoracic cavity

• birth trauma (P10-P15)
• obstetric trauma (O70-O71)

code to identify any retained foreign body, if applicable (Z18.-)

• Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
• The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.

• injuries of breast
• injuries of chest (wall)
• injuries of interscapular area

• burns and corrosions (T20-T32)
• effects of foreign body in bronchus (T17.5)
• effects of foreign body in esophagus (T18.1)
• effects of foreign body in lung (T17.8)
• effects of foreign body in trachea (T17.4)
• frostbite (T33-T34)
• injuries of axilla
• injuries of clavicle
• injuries of scapular region
• injuries of shoulder
• insect bite or sting, venomous (T63.4)

traumatic amputation (partial) of thorax (S28.1)

• any associated injury, such as:
• injury of heart (S26.-)
• injury of intrathoracic organs (S27.-)
• rib fracture (S22.3-, S22.4-)
• spinal cord injury (S24.0-, S24.1-)
• traumatic hemopneumothorax (S27.3)
• traumatic hemothorax (S27.1)
• traumatic pneumothorax (S27.0)
• wound infection

The appropriate 7th character is to be added to each code from category S21

Bite of back wall of thorax NOS

superficial bite of back wall of thorax (S20.47)