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ICD-10 Guide
ICD-10 CodesS21.422

S21.422

Billable

Laceration with 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 S21.422 is a billable code used to indicate a diagnosis of laceration with foreign body of left back wall of thorax with penetration into thoracic cavity.

Key Diagnostic Point:

S21.422 describes a traumatic injury characterized by a laceration on the left back wall of the thorax that has penetrated into the thoracic cavity, accompanied by a foreign body. This type of injury is 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 rib fractures, which are common in such injuries, and monitor for signs of respiratory distress or hemodynamic instability. The management of these patients often involves a multidisciplinary approach, including trauma surgery, critical care, and possibly cardiology, depending on the extent of the injury and the structures involved.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Presence of a foreign body complicates the clinical picture.
  • Potential for multiple associated injuries (e.g., rib fractures, pneumothorax).
  • Need for detailed documentation of the mechanism of injury.
  • Variability in surgical interventions based on the extent of the 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).
  • Improper coding of complications or follow-up procedures.

Specialty Focus

Medical Specialties

Trauma Surgery

Documentation Requirements

Detailed operative notes, imaging results, and follow-up care documentation.

Common Clinical Scenarios

Management of penetrating thoracic injuries, rib fractures, and foreign body removal.

Billing Considerations

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

Emergency Medicine

Documentation Requirements

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

Common Clinical Scenarios

Initial evaluation and stabilization of patients with thoracic trauma.

Billing Considerations

Documentation of the mechanism of injury and immediate interventions performed.

Coding Guidelines

Inclusion Criteria

Use S21.422 When
  • According to ICD
  • 10 coding guidelines, S21
  • 422 should be used when there is a documented laceration with a foreign body that has penetrated the thoracic cavity
  • Coders must ensure that the documentation supports the diagnosis and includes details about the foreign body and any associated injuries

Exclusion Criteria

Do NOT use S21.422 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

CPT 12002CPT Code

Simple repair of a laceration

Clinical Scenario

Used when a simple repair is performed on the laceration.

Documentation Requirements

Documentation must include the size and location of the laceration.

Specialty Considerations

Trauma surgeons must document the complexity of the repair if it involves foreign body removal.

CPT 39000CPT Code

Thoracotomy

Clinical Scenario

Performed to access the thoracic cavity for foreign body removal.

Documentation Requirements

Operative notes must detail the approach and findings.

Specialty Considerations

Documentation must reflect the necessity of the procedure due to 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 claims and facilitating better patient management through detailed documentation of injuries and treatments.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of thoracic injuries, improving the accuracy of claims and facilitating better patient management through detailed documentation of injuries and treatments.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of thoracic injuries, improving the accuracy of claims and facilitating better patient management through detailed documentation of injuries and treatments.

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 S21.422 accurately?

Accurate coding of S21.422 is crucial for proper reimbursement, tracking of trauma cases, and ensuring that patients receive appropriate care based on the severity of their injuries.