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ICD-10 Guide
ICD-10 CodesS21.412

S21.412

Billable

Laceration without foreign body of left back wall of thorax with penetration into thoracic cavity

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

Code Description

ICD-10 S21.412 is a billable code used to indicate a diagnosis of laceration without foreign body of left back wall of thorax with penetration into thoracic cavity.

Key Diagnostic Point:

This code describes a specific type of chest trauma characterized by a laceration on the left back wall of the thorax that penetrates into the thoracic cavity. Such injuries can occur due to blunt or penetrating trauma, including accidents, falls, or violence. The thoracic cavity houses vital organs such as the lungs and heart, making this type of injury particularly concerning. The presence of a laceration without a foreign body suggests that the injury is not complicated by retained objects, but the penetration into the thoracic cavity raises the risk for serious complications such as pneumothorax (air in the pleural space), hemothorax (blood in the pleural space), and potential cardiac injuries. Immediate assessment and intervention are critical, often requiring imaging studies like chest X-rays or CT scans to evaluate the extent of the injury and guide surgical interventions if necessary. Management may involve thoracotomy or thoracostomy to address any complications arising from the injury.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Need for precise documentation of the injury's location and depth
  • Differentiation between types of thoracic injuries (e.g., pneumothorax vs. hemothorax)
  • Potential for associated rib fractures or other thoracic injuries
  • Variability in surgical interventions based on injury severity

Audit Risk Factors

  • Inadequate documentation of the mechanism of injury
  • Failure to document associated injuries (e.g., pneumothorax, hemothorax)
  • Lack of clarity on the depth of the laceration
  • Misclassification of the injury type

Specialty Focus

Medical Specialties

Trauma Surgery

Documentation Requirements

Detailed operative notes, imaging results, and follow-up assessments are essential.

Common Clinical Scenarios

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

Billing Considerations

Accurate coding requires thorough documentation of the surgical approach and any complications encountered.

Emergency Medicine

Documentation Requirements

Comprehensive initial assessment notes, including vital signs and imaging interpretations.

Common Clinical Scenarios

Initial evaluation and stabilization of patients with chest trauma.

Billing Considerations

Documentation must reflect the urgency of the situation and any immediate interventions performed.

Coding Guidelines

Inclusion Criteria

Use S21.412 When
  • Follow the official ICD
  • CM coding guidelines, ensuring that the documentation supports the diagnosis
  • Include details about the mechanism of injury, associated injuries, and any surgical interventions performed

Exclusion Criteria

Do NOT use S21.412 When
  • Exclude codes for injuries with foreign bodies or those that do not penetrate the thoracic cavity

Related ICD-10 Codes

Related CPT Codes

32000CPT Code

Thoracentesis

Clinical Scenario

Used to drain fluid or air from the thoracic cavity following a laceration.

Documentation Requirements

Document the indication for the procedure, the amount of fluid removed, and the patient's response.

Specialty Considerations

Ensure that the procedure is linked to the diagnosis of the laceration.

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. S21.412 provides a clear distinction between types of lacerations, which aids in clinical management and research.

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. S21.412 provides a clear distinction between types of lacerations, which aids in clinical management and research.

Reimbursement & Billing Impact

reimbursement processes. S21.412 provides a clear distinction between types of lacerations, which aids in clinical management and research.

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 significance of coding S21.412 accurately?

Accurate coding of S21.412 is crucial for proper reimbursement, tracking of trauma cases, and ensuring that patients receive appropriate care based on the severity of their injuries.