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v1.0.0
ICD-10 Guide
ICD-10 CodesS21.3

S21.3

Billable

Open wound of front wall of thorax with penetration into thoracic cavity

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/23/2025

Code Description

ICD-10 S21.3 is a billable code used to indicate a diagnosis of open wound of front wall of thorax with penetration into thoracic cavity.

Key Diagnostic Point:

An open wound of the front wall of the thorax with penetration into the thoracic cavity is a serious injury that can result from blunt or penetrating trauma. This type of injury may involve damage to the skin, subcutaneous tissue, and underlying structures, including ribs, lungs, and major blood vessels. The penetration into the thoracic cavity can lead to complications such as pneumothorax (air in the pleural space), hemothorax (blood in the pleural space), and potential cardiac injuries. Patients may present with respiratory distress, chest pain, and signs of shock. Immediate medical intervention is critical to manage these injuries, which may include chest tube placement, surgical repair, and monitoring for complications. The complexity of treatment and the potential for life-threatening conditions necessitate thorough documentation and accurate coding to ensure appropriate care and reimbursement.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Variety of potential complications (e.g., pneumothorax, hemothorax)
  • Need for immediate surgical intervention
  • Variability in presentation and severity of injuries
  • Potential for associated rib fractures and vascular injuries

Audit Risk Factors

  • Inadequate documentation of the mechanism of injury
  • Failure to document associated injuries (e.g., rib fractures)
  • Lack of clarity on the extent of the wound
  • Inconsistent coding of complications like pneumothorax or hemothorax

Specialty Focus

Medical Specialties

Trauma Surgery

Documentation Requirements

Detailed operative notes, imaging results, and assessments of injury severity.

Common Clinical Scenarios

Management of penetrating chest trauma, surgical repair of thoracic injuries.

Billing Considerations

Accurate documentation of the surgical approach and any complications encountered during the procedure.

Emergency Medicine

Documentation Requirements

Comprehensive assessment notes, including vital signs and initial management steps.

Common Clinical Scenarios

Initial evaluation and stabilization of patients with chest trauma.

Billing Considerations

Clear documentation of the mechanism of injury and any immediate interventions performed.

Coding Guidelines

Inclusion Criteria

Use S21.3 When
  • According to ICD
  • 10 coding guidelines, S21
  • 3 should be used when there is a clear indication of an open wound with penetration into the thoracic cavity
  • Coders must ensure that documentation supports the diagnosis and includes details about the mechanism of injury and any associated complications

Exclusion Criteria

Do NOT use S21.3 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

32551CPT Code

Thoracostomy, tube placement

Clinical Scenario

Used for patients with pneumothorax or hemothorax following an open thoracic wound.

Documentation Requirements

Document indication for tube placement and any complications.

Specialty Considerations

Trauma surgeons must ensure accurate coding of the procedure in relation to the diagnosis.

39000CPT Code

Exploratory thoracotomy

Clinical Scenario

Performed for surgical intervention in cases of severe open thoracic wounds.

Documentation Requirements

Detailed operative report required.

Specialty Considerations

Ensure that the surgical approach and findings are well documented.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of thoracic injuries, improving the accuracy of data collection and reimbursement processes. S21.3 provides a clear distinction for open wounds with penetration, which was less defined in ICD-9.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of thoracic injuries, improving the accuracy of data collection and reimbursement processes. S21.3 provides a clear distinction for open wounds with penetration, which was less defined in ICD-9.

Reimbursement & Billing Impact

reimbursement processes. S21.3 provides a clear distinction for open wounds with penetration, which was less defined in ICD-9.

Resources

Clinical References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Coding & Billing References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Frequently Asked Questions

What is the difference between S21.3 and S21.0?

S21.3 specifies an open wound with penetration into the thoracic cavity, while S21.0 is for open wounds of the thorax without specifying penetration.