ICD-10-CM › S00-T88 › S20-S29 › S21 Open wound of thorax › S21.4
Open wound of back wall of thorax with penetration into thoracic cavity
Not billableICD-10-CM diagnosis code.
This code exists but cannot be submitted on its own. It groups the more specific codes beneath it.
Submit one of these 6 more specific codes instead:
- S21.40 Unspecified open wound of back wall of thorax with penetration into thoracic cavity (also a header)
- S21.41 Laceration without foreign body of back wall of thorax with penetration into thoracic cavity (also a header)
- S21.42 Laceration with foreign body of back wall of thorax with penetration into thoracic cavity (also a header)
- S21.43 Puncture wound without foreign body of back wall of thorax with penetration into thoracic cavity (also a header)
- S21.44 Puncture wound with foreign body of back wall of thorax with penetration into thoracic cavity (also a header)
- S21.45 Open bite of back wall of thorax with penetration into thoracic cavity (also a header)
This code requires a seventh character. See the rule below.
What has happened to this code
Every change the publisher made, from 2012 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.
- FY2012 Added to the draft code set draft Open wound of back wall of thorax with penetration into thoracic cavity
Official coding rules
Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.
Inherited from S21 Open wound of thorax
Seventh character required
- The appropriate 7th character is to be added to each code from category S21
Excludes1 - never coded here
- traumatic amputation (partial) of thorax (S28.1)
Code also
- 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
Inherited from the S20-S29 section Injuries to the thorax (S20-S29)
Excludes2 - not included here
- 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)
Includes
- injuries of breast
- injuries of chest (wall)
- injuries of interscapular area
Codes in the same group
| Code | Description | Status |
|---|---|---|
| S21.0 | Open wound of breast | Not billable |
| S21.1 | Open wound of front wall of thorax without penetration into thoracic cavity | Not billable |
| S21.2 | Open wound of back wall of thorax without penetration into thoracic cavity | Not billable |
| S21.3 | Open wound of front wall of thorax with penetration into thoracic cavity | Not billable |
| S21.9 | Open wound of unspecified part of thorax | Not billable |