ICD-10 Logo
ICDxICD-10 Medical Coding
ICD-10 Logo
ICDxICD-10 Medical Coding
ICD 10 CodesDiagnoses
ICD 10 CodesDiagnoses
ICD-10 Logo
ICDxICD-10 Medical Coding

Comprehensive ICD-10-CM code reference with AI-powered search capabilities.

© 2025 ICD Code Compass. All rights reserved.

Browse

  • All Chapters
  • All Categories
  • Diagnoses

Tools

  • AI Code Search
ICD-10-CM codes are maintained by the CDC and CMS. This tool is for reference purposes only.
v1.0.0
ICD-10 Guide
ICD-10 CodesM84.664

M84.664

Billable

Pathological fracture in other disease, left fibula

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

Code Description

ICD-10 M84.664 is a billable code used to indicate a diagnosis of pathological fracture in other disease, left fibula.

Key Diagnostic Point:

A pathological fracture of the left fibula occurs when the bone breaks due to an underlying disease process rather than from a direct trauma. This type of fracture is often associated with conditions that affect bone density and metabolism, such as osteoporosis, osteomalacia, or metastatic bone disease. 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 fibula, being a weight-bearing bone, can be particularly susceptible to fractures in individuals with weakened bone density. Diagnosis typically involves imaging studies such as X-rays or MRI, which can reveal the fracture and any associated bone pathology. Treatment may include pain management, stabilization of the fracture, and addressing the underlying condition to improve bone health. Understanding the etiology of the fracture is crucial for effective management and prevention of future fractures.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Requires understanding of underlying diseases affecting bone health.
  • Differentiation from traumatic fractures.
  • Need for accurate documentation of the underlying condition.
  • Potential for multiple comorbidities affecting coding.

Audit Risk Factors

  • Inadequate documentation of the underlying disease.
  • Failure to specify the location of the fracture.
  • Misclassification as a traumatic fracture.
  • Lack of supporting imaging documentation.

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

Detailed notes on fracture type, location, and underlying conditions.

Common Clinical Scenarios

Patients presenting with fractures after minimal trauma, often with a history of osteoporosis.

Billing Considerations

Ensure that the underlying disease is well-documented to support the use of M84.664.

Endocrinology

Documentation Requirements

Comprehensive assessment of bone density and metabolic disorders.

Common Clinical Scenarios

Patients with osteoporosis or metabolic bone diseases experiencing fractures.

Billing Considerations

Documenting the patient's bone health status and treatment plans is essential.

Coding Guidelines

Inclusion Criteria

Use M84.664 When
  • According to ICD
  • 10 guidelines, M84
  • 664 should be used when a fracture occurs in the context of another disease affecting bone density
  • Coders must ensure that the underlying condition is documented and that the fracture is not due to direct trauma
  • energy trauma

Exclusion Criteria

Do NOT use M84.664 When
  • Exclusion criteria include fractures resulting from high

Related ICD-10 Codes

Related CPT Codes

20610CPT Code

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

Clinical Scenario

Used when a patient with a pathological fracture requires joint aspiration for swelling.

Documentation Requirements

Document the reason for aspiration and the joint involved.

Specialty Considerations

Orthopedic specialists should ensure that the fracture and joint involvement are clearly linked.

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. M84.664 provides a clear distinction between fractures due to underlying diseases and those resulting from trauma, enhancing data accuracy for treatment and research.

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. M84.664 provides a clear distinction between fractures due to underlying diseases and those resulting from trauma, enhancing data accuracy for treatment and research.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of pathological fractures, improving the ability to capture the complexity of these cases. M84.664 provides a clear distinction between fractures due to underlying diseases and those resulting from trauma, enhancing data accuracy for treatment and research.

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.