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ICD-10 Guide
ICD-10 CodesS21.429

S21.429

Billable

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

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

Code Description

ICD-10 S21.429 is a billable code used to indicate a diagnosis of laceration with foreign body of unspecified back wall of thorax with penetration into thoracic cavity.

Key Diagnostic Point:

This code describes a traumatic injury characterized by a laceration in the back wall of the thorax that has been penetrated by a foreign body, resulting in an injury that extends into the thoracic cavity. Such injuries can occur due to various mechanisms, including stab wounds, gunshot wounds, or accidental injuries from sharp objects. The presence of a foreign body complicates the clinical picture, as it may lead to additional complications such as pneumothorax (air in the pleural space), hemothorax (blood in the pleural space), or even cardiac injuries if the foreign body penetrates the pericardium. The management of these injuries often requires surgical intervention to remove the foreign body, repair any damaged structures, and address any resultant complications. Accurate coding is essential for proper reimbursement and to reflect the severity of the injury in the patient's medical record.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Presence of foreign body complicates the clinical picture.
  • 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).
  • Improper linkage of surgical procedures to the diagnosis.

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 thoracic injuries, surgical repair of lacerations, and removal of foreign bodies.

Billing Considerations

Ensure all associated injuries are documented and coded appropriately.

Emergency Medicine

Documentation Requirements

Comprehensive initial assessment notes, imaging results, and treatment plans.

Common Clinical Scenarios

Initial evaluation and stabilization of patients with thoracic trauma.

Billing Considerations

Accurate documentation of vital signs and immediate interventions is crucial.

Coding Guidelines

Inclusion Criteria

Use S21.429 When
  • Follow official ICD
  • CM coding guidelines, ensuring to capture the full extent of the injury and any associated complications
  • Include additional codes for any related conditions such as pneumothorax or hemothorax

Exclusion Criteria

Do NOT use S21.429 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 pleural space in cases of hemothorax or pneumothorax.

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 thoracic injury.

39000CPT Code

Thoracotomy

Clinical Scenario

Performed for direct access to the thoracic cavity to remove foreign bodies or repair injuries.

Documentation Requirements

Detailed operative report outlining the procedure performed and findings.

Specialty Considerations

Document any complications encountered during surgery.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of injuries, including those with foreign bodies. This specificity aids in better tracking of injury patterns and outcomes, which can improve patient care and resource allocation.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of injuries, including those with foreign bodies. This specificity aids in better tracking of injury patterns and outcomes, which can improve patient care and resource allocation.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of injuries, including those with foreign bodies. This specificity aids in better tracking of injury patterns and outcomes, which can improve patient care and resource allocation.

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 S21.429?

Coding S21.429 accurately reflects the severity of a thoracic injury involving a foreign body, which is crucial for appropriate treatment planning and reimbursement.