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ICD-10 Guide
ICD-10 CodesM84.429

M84.429

Billable

Pathological fracture, unspecified humerus

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

Code Description

ICD-10 M84.429 is a billable code used to indicate a diagnosis of pathological fracture, unspecified humerus.

Key Diagnostic Point:

A pathological fracture of the humerus refers to a break in the bone that occurs due to underlying disease processes rather than trauma. This type of fracture is often associated with conditions that weaken bone integrity, such as osteoporosis, metastatic cancer, or other metabolic bone disorders. In the case of the humerus, the fracture may occur in the proximal, mid-shaft, or distal regions, and the specific location can influence treatment and prognosis. Patients with osteoporosis, characterized by decreased bone density and quality, are particularly susceptible to such fractures, which can occur with minimal or no trauma. The diagnosis of a pathological fracture typically involves imaging studies, such as X-rays or CT scans, to confirm the fracture and assess for any underlying conditions. Management may include surgical intervention, such as fixation or joint replacement, alongside treatment for the underlying bone density disorder. Understanding the etiology of the fracture is crucial for effective treatment and prevention of future fractures, emphasizing the importance of comprehensive patient evaluation and management.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between traumatic and pathological fractures
  • Identifying underlying conditions contributing to bone weakness
  • Documenting the specific location of the fracture
  • Understanding the patient's history of bone density disorders

Audit Risk Factors

  • Inadequate documentation of the underlying cause of the fracture
  • Failure to specify the location of the fracture
  • Misclassification of the fracture type (pathological vs. traumatic)
  • Lack of supporting imaging studies in the medical record

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

Detailed notes on fracture location, mechanism of injury, and any underlying conditions affecting bone health.

Common Clinical Scenarios

Patients presenting with fractures after minimal trauma, particularly in older adults or those with known osteoporosis.

Billing Considerations

Ensure that the documentation clearly distinguishes between traumatic and pathological fractures to avoid coding errors.

Endocrinology

Documentation Requirements

Comprehensive evaluation of bone density, including DEXA scan results and treatment plans for osteoporosis.

Common Clinical Scenarios

Patients with osteoporosis or metabolic bone diseases presenting with fractures.

Billing Considerations

Documenting the patient's history of bone density disorders is crucial for accurate coding.

Coding Guidelines

Inclusion Criteria

Use M84.429 When
  • According to ICD
  • 10 coding guidelines, M84
  • 429 should be used when a pathological fracture of the humerus is confirmed, and the specific site of the fracture is not documented
  • Coders should ensure that the underlying cause of the fracture is well
  • documented to support the use of this code

Exclusion Criteria

Do NOT use M84.429 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 M84.429 when joint aspiration is needed due to swelling or pain.

Documentation Requirements

Document the reason for aspiration and any findings during the procedure.

Specialty Considerations

Orthopedic specialists should ensure that the procedure 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 fractures, including the ability to differentiate between traumatic and pathological fractures. M84.429 provides a clear designation for unspecified pathological fractures, which aids in tracking and managing patient outcomes more effectively.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of fractures, including the ability to differentiate between traumatic and pathological fractures. M84.429 provides a clear designation for unspecified pathological fractures, which aids in tracking and managing patient outcomes more effectively.

Reimbursement & Billing Impact

reimbursement and to ensure that the patient's care is appropriately reflected in the medical record.

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 underlying disease processes that weaken the bone, while a traumatic fracture results from an external force or injury. Proper documentation is essential to differentiate between the two for accurate coding.