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ICD-10 Guide
ICD-10 CodesM87.079

M87.079

Billable

Idiopathic aseptic necrosis of unspecified toe(s)

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

Code Description

ICD-10 M87.079 is a billable code used to indicate a diagnosis of idiopathic aseptic necrosis of unspecified toe(s).

Key Diagnostic Point:

Idiopathic aseptic necrosis of the toe(s) is a condition characterized by the death of bone tissue due to a lack of blood supply, without the presence of infection. This condition can lead to pain, swelling, and potential deformity of the affected toe(s). The etiology remains unknown, hence the term 'idiopathic.' Aseptic necrosis can occur in various bones, but when it affects the toes, it may result from factors such as trauma, vascular insufficiency, or systemic diseases. Clinically, patients may present with localized pain that worsens with weight-bearing activities. Diagnosis typically involves imaging studies, such as X-rays or MRI, to assess the extent of necrosis and rule out other conditions like osteomyelitis or fractures. Treatment options may include conservative measures like rest and analgesics, or surgical interventions in severe cases. Understanding this condition is crucial for accurate coding and appropriate management.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Lack of clear etiology complicates diagnosis.
  • Differentiation from osteomyelitis and other bone conditions.
  • Potential for misclassification with other necrotic conditions.
  • Need for comprehensive documentation to support the diagnosis.

Audit Risk Factors

  • Inadequate documentation of clinical findings.
  • Failure to differentiate from osteomyelitis.
  • Lack of imaging studies in the medical record.
  • Insufficient detail on treatment plans.

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

Detailed clinical notes including patient history, physical examination findings, imaging results, and treatment plans.

Common Clinical Scenarios

Patients presenting with toe pain, swelling, or deformity; post-traumatic cases; and those with systemic conditions affecting bone health.

Billing Considerations

Ensure clear documentation of the idiopathic nature and exclusion of other causes of necrosis.

Podiatry

Documentation Requirements

Comprehensive foot examinations, including vascular assessments and detailed descriptions of symptoms.

Common Clinical Scenarios

Patients with chronic foot pain, athletes with overuse injuries, and those with diabetes or vascular disease.

Billing Considerations

Document any co-existing conditions that may contribute to necrosis.

Coding Guidelines

Inclusion Criteria

Use M87.079 When
  • Follow official ICD
  • CM coding guidelines, ensuring accurate documentation of the condition's idiopathic nature

Exclusion Criteria

Do NOT use M87.079 When
  • Exclude codes for osteomyelitis or other specified conditions that may mimic symptoms

Related ICD-10 Codes

Related CPT Codes

20610CPT Code

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

Clinical Scenario

Used for pain management in cases of necrosis.

Documentation Requirements

Document the indication for the procedure and any imaging results.

Specialty Considerations

Orthopedic specialists should ensure clear linkage between the procedure and the diagnosis.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of conditions like idiopathic aseptic necrosis, improving data accuracy and patient care tracking. However, it also requires coders to be more diligent in documentation and differentiation from similar conditions.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of conditions like idiopathic aseptic necrosis, improving data accuracy and patient care tracking. However, it also requires coders to be more diligent in documentation and differentiation from similar conditions.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of conditions like idiopathic aseptic necrosis, improving data accuracy and patient care tracking. However, it also requires coders to be more diligent in documentation and differentiation from similar conditions.

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 primary cause of idiopathic aseptic necrosis?

The primary cause remains unknown, but it is believed to be related to factors that disrupt blood supply to the bone, such as trauma or systemic diseases.

How is idiopathic aseptic necrosis diagnosed?

Diagnosis typically involves a combination of clinical evaluation, imaging studies like X-rays or MRI, and exclusion of other conditions such as osteomyelitis.

What are the treatment options for this condition?

Treatment may include conservative measures such as rest and pain management, or surgical options in more severe cases.