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ICD-10 Guide
ICD-10 CodesS21.102

S21.102

Billable

Unspecified open wound of left front wall of thorax without penetration into thoracic cavity

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

Code Description

ICD-10 S21.102 is a billable code used to indicate a diagnosis of unspecified open wound of left front wall of thorax without penetration into thoracic cavity.

Key Diagnostic Point:

An unspecified open wound of the left front wall of the thorax refers to a traumatic injury that results in a break in the skin and underlying tissues of the thoracic wall on the left side, without any penetration into the thoracic cavity. This type of injury can occur due to various mechanisms, including blunt trauma from accidents, falls, or penetrating injuries from sharp objects. Clinically, such wounds may present with pain, swelling, and potential complications such as rib fractures, pneumothorax, or hemothorax. Rib fractures can occur due to the force of the injury, leading to further complications like lung contusion or injury to the pleura, which may result in pneumothorax (air in the pleural space) or hemothorax (blood in the pleural space). Cardiac injuries may also be a concern, especially in high-impact trauma cases. Surgical interventions may be required to repair the wound, manage any associated rib fractures, or address complications. Accurate coding is essential for proper treatment documentation and reimbursement.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in documentation of wound specifics
  • Potential for associated injuries (e.g., rib fractures, pneumothorax)
  • Need for precise anatomical localization
  • Differentiation from similar codes (e.g., penetrating wounds)

Audit Risk Factors

  • Inadequate documentation of the mechanism of injury
  • Failure to document associated injuries
  • Ambiguity in the description of the wound
  • Inconsistent coding practices among providers

Specialty Focus

Medical Specialties

Emergency Medicine

Documentation Requirements

Detailed description of the injury mechanism, assessment of vital signs, and any immediate interventions performed.

Common Clinical Scenarios

Patients presenting with trauma from motor vehicle accidents, falls, or sports injuries.

Billing Considerations

Ensure documentation includes any imaging studies performed to assess for rib fractures or pneumothorax.

Surgery

Documentation Requirements

Operative reports detailing the surgical approach, findings, and any repairs made to the thoracic wall.

Common Clinical Scenarios

Patients requiring surgical intervention for open thoracic wounds or associated rib fractures.

Billing Considerations

Document any complications encountered during surgery, such as bleeding or injury to underlying structures.

Coding Guidelines

Inclusion Criteria

Use S21.102 When
  • Follow official ICD
  • 10 coding guidelines, ensuring that the code is used only when there is no penetration into the thoracic cavity
  • Document the specific location and nature of the wound, and any associated injuries

Exclusion Criteria

Do NOT use S21.102 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

12001CPT Code

Simple repair of superficial wounds

Clinical Scenario

Used for suturing the open wound on the thorax.

Documentation Requirements

Document the size of the wound and the method of closure.

Specialty Considerations

Emergency medicine providers should ensure that all aspects of the wound repair are documented.

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 research and reimbursement. S21.102 provides a clear classification for open wounds without complications, aiding in accurate treatment documentation.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of injuries, improving the granularity of data for research and reimbursement. S21.102 provides a clear classification for open wounds without complications, aiding in accurate treatment documentation.

Reimbursement & Billing Impact

reimbursement. S21.102 provides a clear classification for open wounds without complications, aiding in accurate treatment documentation.

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 difference between S21.102 and S21.103?

S21.102 refers to an unspecified open wound without penetration into the thoracic cavity, while S21.103 indicates an open wound with penetration into the thoracic cavity, which may involve more serious complications.