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ICD-10 Guide
ICD-10 CodesS21.242

S21.242

Billable

Puncture wound with foreign body of left back wall of thorax without penetration into thoracic cavity

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

Code Description

ICD-10 S21.242 is a billable code used to indicate a diagnosis of puncture wound with foreign body of left back wall of thorax without penetration into thoracic cavity.

Key Diagnostic Point:

S21.242 refers to a puncture wound located on the left back wall of the thorax, which is characterized by the presence of a foreign body. Importantly, this condition does not involve penetration into the thoracic cavity, which distinguishes it from more severe thoracic injuries. Puncture wounds can occur due to various incidents, including accidents, assaults, or impalement injuries. The presence of a foreign body can complicate the clinical picture, as it may lead to infection, inflammation, or further tissue damage. Clinicians must assess for associated injuries, such as rib fractures, pneumothorax, or hemothorax, which can occur even in the absence of thoracic cavity penetration. Proper imaging and clinical evaluation are essential to rule out these complications. Treatment may involve removal of the foreign body, wound care, and monitoring for any delayed complications. Understanding the nuances of this code is crucial for accurate documentation and coding, as it impacts patient management and billing.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between puncture wounds and other types of thoracic injuries.
  • Identifying the presence and type of foreign body.
  • Assessing for associated injuries such as pneumothorax or hemothorax.
  • Documenting the absence of thoracic cavity penetration accurately.

Audit Risk Factors

  • Inadequate documentation of the foreign body.
  • Failure to note associated injuries.
  • Misclassification of the wound type.
  • Lack of clarity on the mechanism of injury.

Specialty Focus

Medical Specialties

Emergency Medicine

Documentation Requirements

Detailed description of the injury mechanism, foreign body type, and any associated injuries.

Common Clinical Scenarios

Patients presenting with stab wounds, impalement injuries, or accidental punctures.

Billing Considerations

Timely assessment and imaging to rule out complications are critical.

Trauma Surgery

Documentation Requirements

Comprehensive surgical notes detailing the procedure for foreign body removal and any additional interventions.

Common Clinical Scenarios

Surgical intervention for foreign body removal and management of associated thoracic injuries.

Billing Considerations

Coordination with radiology for imaging studies to assess for complications.

Coding Guidelines

Inclusion Criteria

Use S21.242 When
  • According to ICD
  • 10 guidelines, S21
  • 242 should be used when documenting a puncture wound with a foreign body that does not penetrate the thoracic cavity
  • Coders must ensure that the documentation supports the diagnosis and includes details about the foreign body and any associated injuries

Exclusion Criteria

Do NOT use S21.242 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

10120CPT Code

Incision and drainage of abscess

Clinical Scenario

Used if the puncture wound becomes infected and requires drainage.

Documentation Requirements

Document the size, location, and nature of the abscess.

Specialty Considerations

Ensure that the procedure is linked to the diagnosis of the puncture wound.

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 puncture wounds with foreign bodies. This specificity aids in better tracking of injury types and outcomes, improving patient care and resource allocation.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of injuries, including puncture wounds with foreign bodies. This specificity aids in better tracking of injury types and outcomes, improving patient care and resource allocation.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of injuries, including puncture wounds with foreign bodies. This specificity aids in better tracking of injury types and outcomes, improving 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 difference between S21.242 and S21.241?

S21.242 refers to a puncture wound on the left back wall of the thorax, while S21.241 refers to the right side. Both codes indicate the presence of a foreign body without thoracic cavity penetration.