Injuries to the thorax (S20-S29)
S21: Open wound of thorax

codeAlso
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

excludes1
traumatic amputation (partial) of thorax (S28.1)

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

sevenChrDef
A: initial encounter
D: subsequent encounter
S: sequela
S21.0: Open wound of breast
S21.1: Open wound of front wall of thorax without penetration into thoracic cavity
S21.2: Open wound of back wall of thorax without penetration into thoracic cavity
S21.3: Open wound of front wall of thorax with penetration into thoracic cavity
S21.4: Open wound of back wall of thorax with penetration into thoracic cavity
S21.9: Open wound of unspecified part of thorax

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