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ICD-10 Guide
ICD-10 CodesS21.251

S21.251

Billable

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

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

Code Description

ICD-10 S21.251 is a billable code used to indicate a diagnosis of open bite of right back wall of thorax without penetration into thoracic cavity.

Key Diagnostic Point:

An open bite of the right 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, patients may present with localized pain, swelling, and potential signs of infection. While the injury is superficial and does not involve the thoracic cavity, it is essential to monitor for complications such as pneumothorax or hemothorax, which can arise from associated rib fractures or deeper injuries. Management typically involves wound care, possible antibiotic therapy, and monitoring for any signs of respiratory distress or other complications. Accurate coding is crucial for appropriate treatment and reimbursement, as well as for tracking injury patterns in trauma registries.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between open and closed injuries
  • Assessing for associated injuries such as rib fractures
  • Understanding the implications of non-penetrating versus penetrating injuries
  • Documentation of the mechanism of injury

Audit Risk Factors

  • Inadequate documentation of the mechanism of injury
  • Failure to note associated injuries or complications
  • Misclassification of open versus closed injuries
  • Lack of follow-up documentation on wound healing

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, animal bites, or sharp object injuries.

Billing Considerations

Ensure that all associated injuries are documented to avoid undercoding.

Trauma Surgery

Documentation Requirements

Comprehensive surgical notes detailing the injury, treatment provided, and any complications.

Common Clinical Scenarios

Surgical intervention for complex thoracic injuries or management of complications.

Billing Considerations

Accurate coding of both the primary injury and any surgical procedures performed.

Coding Guidelines

Inclusion Criteria

Use S21.251 When
  • According to ICD
  • CM guidelines, S21
  • 251 should be used when documenting an open bite injury to the thorax that does not penetrate the thoracic cavity
  • Coders must ensure that the documentation supports the diagnosis and that any associated injuries are coded appropriately

Exclusion Criteria

Do NOT use S21.251 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 injury.

Documentation Requirements

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

Specialty Considerations

Emergency medicine specialists should ensure that all aspects of the injury 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, including open bites, which enhances the ability to track and manage trauma cases effectively.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of injuries, including open bites, which enhances the ability to track and manage trauma cases effectively.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of injuries, including open bites, which enhances the ability to track and manage trauma cases effectively.

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, exposing underlying tissues, while a closed injury does not penetrate the skin.