ICD-10 Logo
ICDxICD-10 Medical Coding
ICD-10 Logo
ICDxICD-10 Medical Coding
ICD 10 CodesDiagnoses
ICD 10 CodesDiagnoses
ICD-10 Logo
ICDxICD-10 Medical Coding

Comprehensive ICD-10-CM code reference with AI-powered search capabilities.

© 2025 ICD Code Compass. All rights reserved.

Browse

  • All Chapters
  • All Categories
  • Diagnoses

Tools

  • AI Code Search
ICD-10-CM codes are maintained by the CDC and CMS. This tool is for reference purposes only.
v1.0.0
ICD-10 Guide
ICD-10 CodesS21.401

S21.401

Billable

Unspecified open wound 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 S21.401 is a billable code used to indicate a diagnosis of unspecified open wound of right back wall of thorax with penetration into thoracic cavity.

Key Diagnostic Point:

An unspecified open wound of the right back wall of the thorax with penetration into the thoracic cavity indicates a traumatic injury that compromises the integrity of the thoracic wall and may involve underlying structures such as the lungs, heart, and major blood vessels. This type of injury can result from various mechanisms, including blunt trauma, penetrating trauma (such as gunshot or stab wounds), or surgical interventions. The penetration into the thoracic cavity raises the risk of complications such as pneumothorax (air in the pleural space), hemothorax (blood in the pleural space), and potential cardiac injuries. Clinical management often requires immediate assessment through imaging studies, such as chest X-rays or CT scans, to evaluate the extent of the injury and guide treatment. Surgical intervention may be necessary to repair the wound, drain fluid collections, or address any damage to thoracic organs. Accurate coding is essential for appropriate reimbursement and to reflect the severity of the injury in the patient's medical record.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in documentation of the type and extent of the wound
  • Need for precise anatomical localization of the injury
  • Potential for associated injuries requiring additional codes
  • Differentiation between open and closed wounds

Audit Risk Factors

  • Inadequate documentation of the mechanism of injury
  • Failure to specify the extent of the wound
  • Omission of associated complications like pneumothorax or hemothorax
  • Incorrect coding of the anatomical site

Specialty Focus

Medical Specialties

Trauma Surgery

Documentation Requirements

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

Common Clinical Scenarios

Management of penetrating trauma, rib fractures, and thoracotomy procedures.

Billing Considerations

Ensure documentation reflects the mechanism of injury and any associated thoracic injuries.

Emergency Medicine

Documentation Requirements

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

Common Clinical Scenarios

Initial evaluation of trauma patients with chest injuries.

Billing Considerations

Document the patient's stability and any immediate interventions performed.

Coding Guidelines

Inclusion Criteria

Use S21.401 When
  • Follow official coding guidelines for trauma coding, ensuring that the documentation supports the diagnosis and reflects the severity of the injury
  • Include any associated complications and ensure accurate anatomical localization

Exclusion Criteria

Do NOT use S21.401 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

32000CPT Code

Thoracentesis

Clinical Scenario

Used for drainage of fluid in cases of hemothorax or pleural effusion.

Documentation Requirements

Document indication for procedure, fluid characteristics, and patient response.

Specialty Considerations

Ensure that the procedure is linked to the diagnosis of 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 injuries, improving the granularity of data for trauma cases. S21.401 provides a clear indication of the nature and severity of the injury, which is crucial for treatment planning and reimbursement.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of injuries, improving the granularity of data for trauma cases. S21.401 provides a clear indication of the nature and severity of the injury, which is crucial for treatment planning and reimbursement.

Reimbursement & Billing Impact

reimbursement.

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 documentation is needed to support the use of S21.401?

Documentation should include the mechanism of injury, details of the wound, imaging results, and any associated complications. Operative notes should clearly outline the surgical interventions performed.