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ICD-10 Guide
ICD-10 CodesM87.00

M87.00

Billable

Idiopathic aseptic necrosis of unspecified bone

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

Code Description

ICD-10 M87.00 is a billable code used to indicate a diagnosis of idiopathic aseptic necrosis of unspecified bone.

Key Diagnostic Point:

Idiopathic aseptic necrosis of unspecified bone refers to the death of bone tissue due to a lack of blood supply, which can occur without any identifiable cause. This condition is characterized by the gradual deterioration of bone, leading to pain, limited mobility, and potential joint dysfunction. The necrosis can affect any bone, but it is most commonly seen in the femoral head, which can lead to osteoarthritis if not managed properly. The etiology remains unclear, but factors such as trauma, corticosteroid use, and excessive alcohol consumption have been associated with the condition. Patients may present with symptoms such as joint pain, swelling, and stiffness, which can mimic other orthopedic conditions. Diagnosis typically involves imaging studies such as X-rays or MRI to assess the extent of bone damage. Treatment options may include conservative management with pain relief, physical therapy, or surgical interventions such as core decompression or joint replacement in advanced cases. Understanding the nuances of this condition is crucial for accurate coding and appropriate management.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Lack of specific etiology makes diagnosis challenging.
  • Differentiation from other types of osteonecrosis is required.
  • Potential overlap with other orthopedic conditions.
  • Documentation must clearly indicate 'idiopathic' nature.

Audit Risk Factors

  • Inadequate documentation of the idiopathic nature.
  • Failure to specify the affected bone.
  • Misuse of related codes leading to incorrect billing.
  • Inconsistent clinical findings in the medical record.

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

Detailed clinical notes, imaging results, and treatment plans must be documented.

Common Clinical Scenarios

Patients presenting with hip pain and limited range of motion, suspected osteonecrosis.

Billing Considerations

Ensure that the documentation specifies the idiopathic nature and any relevant history.

Radiology

Documentation Requirements

Clear imaging reports indicating the presence of necrosis and any differential diagnoses.

Common Clinical Scenarios

MRI findings suggestive of osteonecrosis in patients with unexplained joint pain.

Billing Considerations

Radiologists should correlate imaging findings with clinical symptoms for accurate coding.

Coding Guidelines

Inclusion Criteria

Use M87.00 When
  • According to ICD
  • 10 guidelines, M87
  • 00 should be used when the necrosis is idiopathic and unspecified
  • Coders must ensure that the documentation supports the diagnosis and that no other specific cause is identified

Exclusion Criteria

Do NOT use M87.00 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 for joint pain management in patients with osteonecrosis.

Documentation Requirements

Document the reason for the procedure and any imaging findings.

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 osteonecrosis, improving the ability to track and manage this condition. M87.00 provides a clear designation for idiopathic cases, which aids in research and treatment planning.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of osteonecrosis, improving the ability to track and manage this condition. M87.00 provides a clear designation for idiopathic cases, which aids in research and treatment planning.

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 primary cause of idiopathic aseptic necrosis?

The primary cause remains unknown, but factors such as trauma, corticosteroid use, and excessive alcohol consumption have been associated with the condition.

How is idiopathic aseptic necrosis diagnosed?

Diagnosis is typically made through clinical evaluation and imaging studies, particularly MRI, which can detect early changes in bone.

What are the treatment options for this condition?

Treatment options may include conservative management with pain relief, physical therapy, or surgical interventions such as core decompression or joint replacement.