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v1.0.0
ICD-10 Guide
ICD-10 CodesM84.42

M84.42

Billable

Pathological fracture, humerus

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/17/2025

Code Description

ICD-10 M84.42 is a billable code used to indicate a diagnosis of pathological fracture, humerus.

Key Diagnostic Point:

A pathological fracture of the humerus occurs when the bone breaks due to an underlying disease process rather than from trauma. This type of fracture is often associated with conditions that weaken bone density, such as osteoporosis, metastatic cancer, or other metabolic bone disorders. In patients with osteoporosis, the structural integrity of the bone is compromised, leading to an increased risk of fractures even with minimal or no trauma. The humerus, being a long bone in the upper arm, is particularly susceptible to such fractures in elderly populations or those with significant bone density loss. Diagnosis typically involves imaging studies such as X-rays or CT scans to confirm the fracture and assess the extent of the underlying bone pathology. Treatment may include surgical intervention, such as fixation or replacement, alongside management of the underlying condition to improve bone health and prevent future fractures. Understanding the etiology of the fracture is crucial for effective treatment and prevention strategies.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between traumatic and pathological fractures
  • Understanding underlying conditions like osteoporosis or malignancies
  • Need for detailed documentation of the patient's bone health history
  • Potential for multiple coding scenarios based on comorbidities

Audit Risk Factors

  • Inadequate documentation of the underlying condition leading to the fracture
  • Failure to specify the type of fracture (e.g., displaced vs. non-displaced)
  • Incorrect coding of the fracture site or laterality
  • Lack of follow-up documentation on treatment and outcomes

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

Detailed imaging reports, surgical notes, and follow-up assessments are essential.

Common Clinical Scenarios

Patients presenting with fractures after minimal trauma, particularly in older adults.

Billing Considerations

Ensure that the underlying bone density issues are well-documented to support the diagnosis.

Endocrinology

Documentation Requirements

Comprehensive evaluation of bone density tests and metabolic assessments.

Common Clinical Scenarios

Patients with osteoporosis or other metabolic bone diseases experiencing fractures.

Billing Considerations

Documenting the patient's history of bone health and any treatments for osteoporosis is crucial.

Coding Guidelines

Inclusion Criteria

Use M84.42 When
  • According to ICD
  • 10 guidelines, M84
  • 42 should be used when the fracture is due to a pathological condition
  • Coders must ensure that the underlying cause of the fracture is documented, and any relevant comorbidities are coded appropriately

Exclusion Criteria

Do NOT use M84.42 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

20610CPT Code

Arthrocentesis, aspiration and/or injection into a major joint or bursa

Clinical Scenario

Used in conjunction with M84.42 when joint aspiration is needed due to swelling or pain.

Documentation Requirements

Document the reason for aspiration and findings during the procedure.

Specialty Considerations

Orthopedic specialists should ensure that the aspiration is justified based on clinical findings.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of pathological fractures, improving the ability to capture the complexity of these cases and the underlying conditions that contribute to them.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of pathological fractures, improving the ability to capture the complexity of these cases and the underlying conditions that contribute to them.

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

What is the difference between a pathological fracture and a traumatic fracture?

A pathological fracture occurs due to an underlying disease that weakens the bone, while a traumatic fracture results from an external force or injury.