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ICD-10 Guide
ICD-10 CodesS21.25

S21.25

Billable

Open bite of back wall of thorax without penetration into thoracic cavity

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

Code Description

ICD-10 S21.25 is a billable code used to indicate a diagnosis of open bite of back wall of thorax without penetration into thoracic cavity.

Key Diagnostic Point:

An open bite of the back wall of the thorax refers to a traumatic injury characterized by a laceration or puncture wound that does not penetrate the thoracic cavity. This type of injury can occur due to various mechanisms, including animal bites, sharp objects, or blunt trauma that results in skin and soft tissue damage. Clinically, it is essential to assess the extent of the injury, as it may involve underlying structures such as muscles, nerves, and blood vessels. While the thoracic cavity remains intact, there is a risk of complications such as infection, hematoma formation, or damage to adjacent structures. Patients may present with localized pain, swelling, and tenderness at the site of the injury. Diagnostic imaging may be necessary to rule out associated injuries, particularly rib fractures or pneumothorax, which can occur in conjunction with thoracic trauma. Treatment typically involves wound care, possible surgical intervention for extensive injuries, and monitoring for complications. Understanding the nature of the injury and its implications is crucial for effective management and coding.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between open and closed injuries
  • Assessing the extent of soft tissue damage
  • Potential for associated rib fractures or pneumothorax
  • Need for detailed documentation of injury mechanism

Audit Risk Factors

  • Inadequate documentation of injury mechanism
  • Failure to specify the extent of soft tissue damage
  • Misclassification of open vs. closed injuries
  • Omission of associated injuries such as rib fractures

Specialty Focus

Medical Specialties

Emergency Medicine

Documentation Requirements

Detailed account of the injury mechanism, physical examination findings, and any imaging results.

Common Clinical Scenarios

Patients presenting with trauma from falls, assaults, or animal bites.

Billing Considerations

Ensure thorough documentation of any associated injuries and the patient's vital signs.

Surgery

Documentation Requirements

Operative reports detailing the extent of the injury and any surgical interventions performed.

Common Clinical Scenarios

Surgical repair of extensive soft tissue injuries or complications arising from the initial injury.

Billing Considerations

Document any findings related to underlying structures and the need for follow-up care.

Coding Guidelines

Inclusion Criteria

Use S21.25 When
  • According to ICD
  • 10 guidelines, S21
  • 25 should be used when there is an open bite of the thoracic wall without penetration into the thoracic cavity
  • Coders must ensure that the documentation supports the diagnosis and that there are no indications of deeper injuries

Exclusion Criteria

Do NOT use S21.25 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 bite wound.

Documentation Requirements

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

Specialty Considerations

Ensure that the procedure is linked to the diagnosis of S21.25.

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, which helps in better tracking and management of trauma cases. S21.25 provides clarity in coding thoracic injuries without internal involvement.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of injuries, including open bites, which helps in better tracking and management of trauma cases. S21.25 provides clarity in coding thoracic injuries without internal involvement.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of injuries, including open bites, which helps in better tracking and management of trauma cases. S21.25 provides clarity in coding thoracic injuries without internal involvement.

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 an open bite and a closed injury?

An open bite involves a break in the skin and exposure of underlying tissues, while a closed injury does not break the skin and may involve internal structures.