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ICD-10 Guide
ICD-10 CodesS21.15

S21.15

Billable

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

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

Code Description

ICD-10 S21.15 is a billable code used to indicate a diagnosis of open bite of front wall of thorax without penetration into thoracic cavity.

Key Diagnostic Point:

An open bite of the front wall of the thorax refers to a traumatic injury characterized by a laceration or puncture wound that does not extend into the thoracic cavity. This type of injury can occur due to various mechanisms, including blunt trauma, penetrating injuries, or bites from animals. Clinically, it may present with localized pain, swelling, and potential for infection. While the injury does not penetrate the thoracic cavity, it can still lead to complications such as rib fractures, pneumothorax, or hemothorax if the underlying structures are affected. The management of such injuries often involves thorough wound care, assessment for associated injuries, and possibly surgical intervention to repair any damaged tissues. Accurate coding is essential for proper reimbursement and tracking of trauma-related care.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between open and closed injuries
  • Assessing for associated rib fractures or other thoracic injuries
  • Understanding the implications of non-penetrating versus penetrating injuries
  • Documenting the mechanism of injury accurately

Audit Risk Factors

  • Inadequate documentation of the mechanism of injury
  • Failure to document associated injuries such as rib fractures
  • Misclassification of the injury type (open vs. closed)
  • Lack of follow-up documentation regarding treatment and outcomes

Specialty Focus

Medical Specialties

Emergency Medicine

Documentation Requirements

Detailed documentation of the mechanism of injury, physical examination findings, and any imaging studies performed.

Common Clinical Scenarios

Patients presenting with chest trauma from falls, motor vehicle accidents, or assaults.

Billing Considerations

Ensure that all associated injuries are documented to avoid undercoding.

Trauma Surgery

Documentation Requirements

Comprehensive surgical notes detailing the extent of the injury, surgical interventions performed, and post-operative care.

Common Clinical Scenarios

Patients requiring surgical intervention for chest wall injuries or associated complications.

Billing Considerations

Accurate coding of any surgical procedures performed in conjunction with the injury.

Coding Guidelines

Inclusion Criteria

Use S21.15 When
  • According to ICD
  • 10 coding guidelines, S21
  • 15 should be used when the injury is confirmed as an open bite without penetration into the thoracic cavity
  • Coders should ensure that the documentation supports the diagnosis and that any associated injuries are coded appropriately

Exclusion Criteria

Do NOT use S21.15 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

12001CPT Code

Simple repair of superficial wounds

Clinical Scenario

Used for the repair of the open bite wound in the emergency department.

Documentation Requirements

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

Specialty Considerations

Emergency medicine providers should ensure that the repair is documented in detail.

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. 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. 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. 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 difference between S21.15 and S21.14?

S21.15 is used for open bites that do not penetrate the thoracic cavity, while S21.14 is for those that do penetrate, indicating a more severe injury.