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ICD-10 Guide
ICD-10 CodesM87.07

M87.07

Billable

Idiopathic aseptic necrosis of ankle, foot and toes

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

Code Description

ICD-10 M87.07 is a billable code used to indicate a diagnosis of idiopathic aseptic necrosis of ankle, foot and toes.

Key Diagnostic Point:

Idiopathic aseptic necrosis of the ankle, foot, and toes 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 severe pain, limited mobility, and potential deformities in the affected areas. The etiology remains unknown, hence the term 'idiopathic.' It is often associated with risk factors such as corticosteroid use, excessive alcohol consumption, and certain medical conditions like lupus or sickle cell disease. Patients may present with symptoms such as joint pain, swelling, and stiffness, particularly during 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 management with rest and analgesics, physical therapy, or surgical interventions such as core decompression or joint replacement in severe cases. Early diagnosis and intervention are crucial to prevent further complications and preserve joint function.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating from osteomyelitis and other bone infections
  • Understanding the idiopathic nature and associated risk factors
  • Need for precise imaging documentation
  • Potential overlap with other orthopedic conditions

Audit Risk Factors

  • Inadequate documentation of imaging studies
  • Failure to specify the idiopathic nature of the condition
  • Misclassification with osteomyelitis codes
  • Lack of detailed clinical history or risk factor documentation

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

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

Common Clinical Scenarios

Patients presenting with joint pain and limited mobility, particularly after corticosteroid use or trauma.

Billing Considerations

Ensure to document the absence of infection and the idiopathic nature of the necrosis.

Radiology

Documentation Requirements

Comprehensive imaging reports detailing findings consistent with aseptic necrosis.

Common Clinical Scenarios

Imaging studies requested for patients with unexplained joint pain or suspected necrosis.

Billing Considerations

Clear communication of findings to referring physicians to aid in accurate diagnosis and coding.

Coding Guidelines

Inclusion Criteria

Use M87.07 When
  • According to ICD
  • 10 guidelines, M87
  • 07 should be used when the necrosis is confirmed to be idiopathic and not due to any infectious process
  • Coders should ensure that the documentation supports the diagnosis and that other potential causes of bone necrosis are ruled out

Exclusion Criteria

Do NOT use M87.07 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 when joint aspiration is performed to relieve pain or for diagnostic purposes.

Documentation Requirements

Document the indication for the procedure and any findings from the aspiration.

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 conditions like M87.07, improving the accuracy of diagnoses and treatment tracking. This specificity aids in better patient management and resource allocation.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of conditions like M87.07, improving the accuracy of diagnoses and treatment tracking. This specificity aids in better patient management and resource allocation.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of conditions like M87.07, improving the accuracy of diagnoses and treatment tracking. This specificity aids in better patient management and resource allocation.

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 are the common symptoms of idiopathic aseptic necrosis?

Common symptoms include joint pain, swelling, and stiffness, particularly during weight-bearing activities. Patients may also experience limited range of motion in the affected joints.