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ICD-10 Guide
ICD-10 CodesS21.359

S21.359

Billable

Open bite of unspecified front wall of thorax with penetration into thoracic cavity

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

Code Description

ICD-10 S21.359 is a billable code used to indicate a diagnosis of open bite of unspecified front wall of thorax with penetration into thoracic cavity.

Key Diagnostic Point:

An open bite of the thorax is a traumatic injury characterized by a penetrating wound that breaches the front wall of the thoracic cavity. This injury can result from various mechanisms, including animal bites, human bites, or sharp object injuries. The penetration into the thoracic cavity poses significant risks, including pneumothorax (air in the pleural space), hemothorax (blood in the pleural space), and potential cardiac injuries due to the proximity of vital structures. Patients may present with respiratory distress, chest pain, and signs of shock. Immediate assessment and intervention are critical, often requiring imaging studies such as chest X-rays or CT scans to evaluate the extent of the injury. Surgical intervention may be necessary to repair the wound, drain fluid collections, or address any underlying organ damage. The complexity of managing such injuries lies in the potential for multiple associated complications, necessitating a multidisciplinary approach for optimal patient outcomes.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Variety of potential associated injuries (e.g., rib fractures, pneumothorax)
  • Need for immediate surgical intervention in many cases
  • Potential for life-threatening complications
  • Variability in documentation based on injury mechanism

Audit Risk Factors

  • Inadequate documentation of the mechanism of injury
  • Failure to document associated injuries or complications
  • Misclassification of the injury type (open vs. closed)
  • Lack of clarity in surgical intervention details

Specialty Focus

Medical Specialties

Trauma Surgery

Documentation Requirements

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

Common Clinical Scenarios

Management of penetrating chest injuries, surgical repair of thoracic wall defects.

Billing Considerations

Ensure all associated injuries are documented, including any thoracotomy performed.

Emergency Medicine

Documentation Requirements

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

Common Clinical Scenarios

Initial evaluation and stabilization of patients with open thoracic injuries.

Billing Considerations

Document the mechanism of injury and any immediate interventions performed.

Coding Guidelines

Inclusion Criteria

Use S21.359 When
  • Follow official ICD
  • CM coding guidelines, ensuring accurate documentation of the injury's specifics, including the mechanism and any associated complications
  • This code is part of the S21 category, which covers injuries to the thorax

Exclusion Criteria

Do NOT use S21.359 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

32000CPT Code

Thoracentesis, needle drainage of pleural space

Clinical Scenario

Used when a patient presents with hemothorax or pneumothorax due to the injury.

Documentation Requirements

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

Specialty Considerations

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

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. S21.359 provides a clear framework for documenting complex open thoracic injuries.

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. S21.359 provides a clear framework for documenting complex open thoracic injuries.

Reimbursement & Billing Impact

reimbursement processes. S21.359 provides a clear framework for documenting complex open thoracic injuries.

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 primary concern with an open bite to the thorax?

The primary concern is the risk of penetrating vital structures, leading to complications such as pneumothorax, hemothorax, and potential cardiac injuries.