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ICD-10 Guide
ICD-10 CodesS21.35

S21.35

Billable

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

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

Code Description

ICD-10 S21.35 is a billable code used to indicate a diagnosis of open bite of front wall of thorax with penetration into thoracic cavity.

Key Diagnostic Point:

An open bite of the front wall of the thorax with penetration into the thoracic cavity is a severe traumatic injury typically resulting from a penetrating object, such as a knife or a projectile. This injury can lead to significant complications, including pneumothorax (air in the pleural space), hemothorax (blood in the pleural space), and potential cardiac injuries due to the proximity of the heart to the thoracic wall. The clinical presentation may include respiratory distress, chest pain, and signs of shock. Immediate medical intervention is critical, often requiring surgical exploration to repair the thoracic wall and address any damage to the lungs, heart, or major blood vessels. The management of such injuries may involve chest tube placement for drainage of air or blood, and in some cases, thoracotomy may be necessary to control bleeding or repair damaged structures. Accurate coding of this condition is essential for proper reimbursement and tracking of trauma-related healthcare services.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Requires detailed documentation of the mechanism of injury.
  • Involves multiple potential complications that must be documented.
  • May require knowledge of surgical interventions and their coding.
  • Differentiation from similar codes related to thoracic injuries.

Audit Risk Factors

  • Inadequate documentation of the mechanism of injury.
  • Failure to document associated complications like pneumothorax or hemothorax.
  • Lack of clarity on surgical interventions performed.
  • Misclassification of the injury severity.

Specialty Focus

Medical Specialties

Trauma Surgery

Documentation Requirements

Detailed operative reports, imaging studies, and clinical notes describing the injury and treatment.

Common Clinical Scenarios

Management of penetrating chest trauma, surgical repair of thoracic injuries, and post-operative care.

Billing Considerations

Ensure all surgical interventions are documented, including any complications that arise during treatment.

Emergency Medicine

Documentation Requirements

Comprehensive documentation of initial assessment, imaging results, and treatment provided in the emergency setting.

Common Clinical Scenarios

Initial evaluation and stabilization of patients with chest trauma, including airway management and fluid resuscitation.

Billing Considerations

Accurate coding of the initial encounter is crucial for proper reimbursement and tracking of trauma cases.

Coding Guidelines

Inclusion Criteria

Use S21.35 When
  • Follow official ICD
  • CM coding guidelines, ensuring accurate documentation of the injury's mechanism, associated complications, and any surgical interventions
  • Include any relevant external cause codes to provide context for the injury

Exclusion Criteria

Do NOT use S21.35 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

32000CPT Code

Thoracentesis

Clinical Scenario

Used when a patient presents with a hemothorax requiring drainage.

Documentation Requirements

Document the indication for the procedure, the amount of fluid removed, and any complications.

Specialty Considerations

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

32010CPT Code

Chest tube insertion

Clinical Scenario

Performed for pneumothorax management.

Documentation Requirements

Document the reason for tube placement and any complications during the procedure.

Specialty Considerations

Link the procedure to the diagnosis of pneumothorax.

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 open bites of the thorax. This specificity aids in better tracking of trauma cases and improves the accuracy of healthcare data.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of injuries, including open bites of the thorax. This specificity aids in better tracking of trauma cases and improves the accuracy of healthcare data.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of injuries, including open bites of the thorax. This specificity aids in better tracking of trauma cases and improves the accuracy of healthcare data.

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 of the thorax?

The primary concern is the potential for penetration into the thoracic cavity, which can lead to life-threatening complications such as pneumothorax, hemothorax, and cardiac injuries.

How should associated complications be documented?

All associated complications should be clearly documented in the medical record, including imaging results and any interventions performed to address these complications.