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ICD-10 Guide
ICD-10 CodesS21.421

S21.421

Billable

Laceration with foreign body of right back wall of thorax with penetration into thoracic cavity

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

Code Description

ICD-10 S21.421 is a billable code used to indicate a diagnosis of laceration with foreign body of right back wall of thorax with penetration into thoracic cavity.

Key Diagnostic Point:

This code describes a traumatic injury characterized by a laceration on the right back wall of the thorax, which has been penetrated by a foreign body, resulting in an injury that extends into the thoracic cavity. Such injuries are often the result of penetrating trauma, such as stab wounds or gunshot wounds, and can lead to serious complications including pneumothorax, hemothorax, and potential cardiac injuries. The presence of a foreign body complicates the clinical picture, as it may necessitate surgical intervention to remove the object and repair any damage to the thoracic structures. Clinicians must assess for associated injuries, including rib fractures, which can further complicate the management of the patient. The thoracic cavity houses vital organs, and any penetration can lead to significant morbidity if not promptly addressed. Accurate coding of this condition is crucial for appropriate treatment planning and reimbursement.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Presence of a foreign body complicates the clinical scenario.
  • Potential for multiple associated injuries (e.g., pneumothorax, hemothorax).
  • Need for detailed documentation of the mechanism of injury.
  • Variability in surgical interventions based on the extent of injury.

Audit Risk Factors

  • Inadequate documentation of the mechanism of injury.
  • Failure to document the presence and type of foreign body.
  • Lack of clarity on associated injuries (e.g., pneumothorax, hemothorax).
  • Inconsistent coding of related procedures or interventions.

Specialty Focus

Medical Specialties

Trauma Surgery

Documentation Requirements

Detailed operative reports, imaging studies, and notes on the mechanism of injury.

Common Clinical Scenarios

Management of penetrating trauma, surgical repair of thoracic injuries, and removal of foreign bodies.

Billing Considerations

Ensure all associated injuries are documented to support coding and reimbursement.

Emergency Medicine

Documentation Requirements

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

Common Clinical Scenarios

Initial evaluation and stabilization of patients with thoracic trauma.

Billing Considerations

Documenting the patient's response to treatment and any changes in condition.

Coding Guidelines

Inclusion Criteria

Use S21.421 When
  • Follow official ICD
  • CM coding guidelines, ensuring accurate documentation of the injury's specifics, including the mechanism of injury and any associated conditions
  • Include details on the foreign body and its implications for treatment

Exclusion Criteria

Do NOT use S21.421 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

32000CPT Code

Thoracentesis

Clinical Scenario

Used to drain fluid or air from the thoracic cavity in cases of hemothorax or pneumothorax.

Documentation Requirements

Document the indication for the procedure and the amount of fluid removed.

Specialty Considerations

Ensure that the procedure is linked to the diagnosis of thoracic injury.

39000CPT Code

Exploratory thoracotomy

Clinical Scenario

Performed when there is a need to explore the thoracic cavity for foreign body removal or repair.

Documentation Requirements

Detailed operative report outlining findings and interventions.

Specialty Considerations

Document all findings and any associated injuries.

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. S21.421 reflects the complexity of managing penetrating thoracic trauma.

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. S21.421 reflects the complexity of managing penetrating thoracic trauma.

Reimbursement & Billing Impact

reimbursement processes. S21.421 reflects the complexity of managing penetrating thoracic trauma.

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 S21.421 accurately?

Accurate coding of S21.421 is crucial for appropriate treatment planning, reimbursement, and tracking of trauma-related outcomes. It ensures that healthcare providers are compensated for the complexity of care required for patients with penetrating thoracic injuries.