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ICD-10 Guide
ICD-10 CodesM87.046

M87.046

Billable

Idiopathic aseptic necrosis of unspecified finger(s)

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

Code Description

ICD-10 M87.046 is a billable code used to indicate a diagnosis of idiopathic aseptic necrosis of unspecified finger(s).

Key Diagnostic Point:

Idiopathic aseptic necrosis of the finger(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 is termed 'idiopathic' because the exact cause is unknown, although it may be associated with factors such as trauma, corticosteroid use, or excessive alcohol consumption. The necrosis typically affects the subchondral bone, leading to pain, swelling, and potential joint dysfunction. In the fingers, this can manifest as limited range of motion and difficulty in performing daily activities. Diagnosis is often made through imaging studies such as X-rays or MRI, which can reveal changes in bone density and structure. Treatment options may include conservative measures like rest and physical therapy, or surgical interventions in more severe 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 clear etiology complicates diagnosis.
  • Differentiation from other forms of osteonecrosis is necessary.
  • Potential overlap with other conditions affecting the fingers.
  • Documentation must specify 'idiopathic' to avoid misclassification.

Audit Risk Factors

  • Insufficient documentation of the idiopathic nature.
  • Inadequate imaging reports to support diagnosis.
  • Failure to specify the affected finger(s).
  • Misclassification with other osteonecrosis codes.

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

Detailed imaging reports, treatment plans, and follow-up notes.

Common Clinical Scenarios

Patients presenting with finger pain and limited mobility, often after trauma or corticosteroid use.

Billing Considerations

Ensure that the idiopathic nature is clearly documented to avoid misclassification.

Rheumatology

Documentation Requirements

Comprehensive patient history, including medication use and lifestyle factors.

Common Clinical Scenarios

Patients with a history of autoimmune disorders or chronic steroid use presenting with finger joint pain.

Billing Considerations

Consideration of other underlying conditions that may contribute to osteonecrosis.

Coding Guidelines

Inclusion Criteria

Use M87.046 When
  • According to ICD
  • 10 guidelines, this code should be used when the necrosis is confirmed to be idiopathic and not due to other identifiable causes
  • Documentation must support the diagnosis, including imaging results and clinical findings

Exclusion Criteria

Do NOT use M87.046 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 necrosis.

Documentation Requirements

Document the reason for the procedure and the joint involved.

Specialty Considerations

Orthopedic specialists may perform this procedure for symptomatic relief.

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 the accuracy of patient records and facilitating better treatment planning.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of conditions like idiopathic aseptic necrosis, improving the accuracy of patient records and facilitating better 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 is unknown, but it may be associated with factors such as trauma, corticosteroid use, or excessive alcohol consumption.