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  1. ICD.Codes
  2. ICD-10-CM (2016)
  3. Chapter 19
  4. Section S20-S29
  5. Code S21

ICD-10-CM Code S21
Open wound of thorax

NON-BILLABLE
Non-Billable Code
Non-Billable means the code is not sufficient justification for admission to an acute care hospital when used a principal diagnosis. Use a child code to capture more detail.
| ICD-10 from 2011 - 2016

ICD Code S21 is a non-billable code. To code a diagnosis of this type, you must use one of the six child codes of S21 that describes the diagnosis 'open wound of thorax' in more detail.

The ICD code S21 is used to code Chest injury

A chest injury is any form of physical injury to the chest including the ribs, heart and lungs. Chest injuries account for 25% of all deaths from traumatic injury. Typically chest injuries are caused by blunt mechanisms such as motor vehicle collisions or penetrating mechanisms such as stabbings.

Specialty: Emergency Medicine
MeSH Code: D013898
ICD 9 Code: 959.11

A chest X-ray of a right sided pulmonary contusion associated with flail chest and subcutaneous emphysema

Source: Wikipedia

Coding Notes for S21 Info for medical coders on how to properly use this ICD-10 code

Code Also Note:
Code Also
A Code Also note indicates that two or more codes may be required to fully describe a condition, but the order of codes is at the coder's discretion. Code order depends on the severity of the conditions and the reason for the encounter.
Any associated injury, such as:
Injury of heart See code S26.-
Injury of intrathoracic organs See code S27.-
Rib fracture (S22.3-, S22.4-) See code S22.3-
Spinal cord injury (S24.0-, S24.1-) See code S24.0-
Traumatic hemopneumothorax See code S27.3
Traumatic hemothorax See code S27.1
Traumatic pneumothorax See code S27.0
Wound infection
Code Type-1 Excludes:
Type-1 Excludes
Type-1 Excludes mean the conditions excluded are mutually exclusive and should never be coded together. Excludes 1 means "do not code here."
Traumatic amputation (partial) of thorax - instead, use code S28.1
7th Character Extension Notes:

What is 7th Character Extension?

For codes less than 6 characters that require a 7th character a placeholder 'X' should be assigned for all characters less than 6. The 7th character must always be the 7th position of a code. E.g. The ICD-10-CM code T67.4 (Heat exhaustion due to salt depletion) requires an Episode of Care identifier. T67.4XXA Initial Encounter or T67.4XXD Subsequent Encounter. More Info
The appropriate 7th character is to be added to each code from category See Code S21

** This Document Provided By ICD.Codes **
Source: http://icd.codes/icd10cm/S21