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ICD-10 Guide
ICD-10 CodesS42.309

S42.309

Billable

Unspecified fracture of shaft of humerus, unspecified arm

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/24/2025

Code Description

ICD-10 S42.309 is a billable code used to indicate a diagnosis of unspecified fracture of shaft of humerus, unspecified arm.

Key Diagnostic Point:

The S42.309 code refers to an unspecified fracture of the shaft of the humerus, which is the long bone in the upper arm. This type of fracture can occur due to various mechanisms, including trauma from falls, sports injuries, or accidents. The humeral shaft is particularly susceptible to fractures due to its length and the forces exerted during impact. Symptoms typically include pain, swelling, and limited range of motion in the affected arm. Diagnosis is usually confirmed through imaging studies such as X-rays or CT scans. Treatment may vary based on the fracture's severity and displacement, ranging from conservative management with immobilization to surgical intervention for more complex cases. Surgical options may include intramedullary nailing or plate fixation to stabilize the fracture and promote healing. Rehabilitation is often necessary to restore function and strength to the arm following treatment.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in fracture types and locations within the humerus
  • Need for precise documentation of fracture characteristics
  • Potential for associated injuries (e.g., nerve damage)
  • Differentiation from other upper arm injuries

Audit Risk Factors

  • Inadequate documentation of fracture specifics
  • Failure to document associated injuries
  • Lack of clarity on treatment plans
  • Misclassification of fracture type

Specialty Focus

Medical Specialties

Orthopedic Surgery

Documentation Requirements

Detailed operative reports, imaging studies, and follow-up notes are essential for accurate coding.

Common Clinical Scenarios

Fractures resulting from falls, sports injuries, or vehicular accidents.

Billing Considerations

Documentation must clearly indicate the fracture type, treatment plan, and any complications.

Physical Medicine and Rehabilitation

Documentation Requirements

Comprehensive assessments of functional limitations and rehabilitation progress.

Common Clinical Scenarios

Patients undergoing rehabilitation post-fracture repair.

Billing Considerations

Focus on documenting functional outcomes and therapy goals.

Coding Guidelines

Inclusion Criteria

Use S42.309 When
  • According to ICD
  • 10 coding guidelines, fractures should be coded based on the specific site and type
  • 309 is used when the fracture is not specified further
  • Coders should ensure that documentation supports the use of this unspecified code and consider the need for more specific codes when available

Exclusion Criteria

Do NOT use S42.309 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

24500CPT Code

Closed treatment of humeral shaft fracture

Clinical Scenario

Used when a patient with S42.309 undergoes closed reduction.

Documentation Requirements

Operative report detailing the procedure and fracture characteristics.

Specialty Considerations

Orthopedic surgeons must document the specifics of the fracture and treatment.

24505CPT Code

Open treatment of humeral shaft fracture

Clinical Scenario

Used when surgical intervention is required for S42.309.

Documentation Requirements

Detailed operative report and imaging studies.

Specialty Considerations

Ensure clear documentation of surgical approach and fixation method.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of fractures, improving the granularity of data for treatment outcomes. However, the unspecified nature of S42.309 may lead to challenges in justifying treatment and reimbursement.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of fractures, improving the granularity of data for treatment outcomes. However, the unspecified nature of S42.309 may lead to challenges in justifying treatment and reimbursement.

Reimbursement & Billing Impact

reimbursement.

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

When should I use S42.309 instead of a more specific code?

Use S42.309 when the documentation does not specify the type or location of the humeral fracture, and no other codes apply.

What documentation is needed to support the use of S42.309?

Documentation should include the mechanism of injury, imaging results, treatment plan, and any associated injuries.