S21.4
S21.4: Open wound of back wall of thorax with penetration into thoracic cavity
Non-billable headerICD-10-CM
S21.4 is a non-billable header ICD-10-CM code for open wound of back wall of thorax with penetration into thoracic cavity. It cannot be billed on its own: choose one of the more specific child codes below. This code also requires a 7th character before it is complete.
This code requires a 7th character
The appropriate 7th character is to be added to each code from category S21
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Code history
Unchanged in every release from FY2024 to FY2027.
Code to one of these instead S21.4
6 child codes. Green means billable.
- S21.40Unspecified open wound of back wall of thorax with penetration into thoracic cavity
- S21.41Laceration without foreign body of back wall of thorax with penetration into thoracic cavity
- S21.42Laceration with foreign body of back wall of thorax with penetration into thoracic cavity
- S21.43Puncture wound without foreign body of back wall of thorax with penetration into thoracic cavity
- S21.44Puncture wound with foreign body of back wall of thorax with penetration into thoracic cavity
- S21.45Open bite of back wall of thorax with penetration into thoracic cavity
Other codes under S21
- S21.0Open wound of breast
- S21.1Open wound of front wall of thorax without penetration into thoracic cavity
- S21.2Open wound of back wall of thorax without penetration into thoracic cavity
- S21.3Open wound of front wall of thorax with penetration into thoracic cavity
- S21.9Open wound of unspecified part of thorax