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ICD-10 Guide
ICD-10 CodesM87.373

M87.373

Billable

Other secondary osteonecrosis, unspecified ankle

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

Code Description

ICD-10 M87.373 is a billable code used to indicate a diagnosis of other secondary osteonecrosis, unspecified ankle.

Key Diagnostic Point:

M87.373 refers to a condition characterized by the death of bone tissue in the ankle due to a lack of blood supply, which is classified as secondary osteonecrosis. This condition can arise from various underlying factors, including trauma, prolonged corticosteroid use, alcohol abuse, or certain medical conditions such as sickle cell disease or systemic lupus erythematosus. Patients may present with symptoms such as pain, swelling, and limited range of motion in the affected ankle. Diagnosis typically involves imaging studies like X-rays or MRI to assess bone integrity and identify necrotic areas. Treatment options may include conservative management with pain relief and physical therapy, or surgical interventions such as core decompression or joint replacement in severe cases. Accurate coding is essential for proper treatment reimbursement and tracking of patient outcomes.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of underlying causes leading to secondary osteonecrosis
  • Need for precise documentation of the underlying condition
  • Differentiation from primary osteonecrosis codes
  • Potential for overlapping symptoms with other orthopedic conditions

Audit Risk Factors

  • Insufficient documentation of the underlying cause
  • Inconsistent use of diagnostic imaging results
  • Failure to document treatment plans and patient responses
  • Misclassification of osteonecrosis type

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

Detailed history of the patient's condition, imaging results, and treatment plans.

Common Clinical Scenarios

Patients presenting with ankle pain and a history of corticosteroid use or trauma.

Billing Considerations

Ensure that the underlying cause of osteonecrosis is clearly documented to support the diagnosis.

Rheumatology

Documentation Requirements

Comprehensive assessment of systemic conditions contributing to osteonecrosis.

Common Clinical Scenarios

Patients with autoimmune disorders presenting with joint pain and potential osteonecrosis.

Billing Considerations

Document any relevant laboratory findings and treatment history related to the systemic condition.

Coding Guidelines

Inclusion Criteria

Use M87.373 When
  • Follow official ICD
  • 10 coding guidelines, ensuring accurate documentation of the underlying cause of osteonecrosis
  • Include any relevant comorbidities and specify the anatomical site as 'unspecified ankle' when applicable

Exclusion Criteria

Do NOT use M87.373 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 pain management in patients with osteonecrosis.

Documentation Requirements

Document the reason for the procedure and the patient's response.

Specialty Considerations

Orthopedic specialists often perform this procedure.

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 effectively. M87.373 provides a clear classification for secondary osteonecrosis, enhancing data accuracy for treatment outcomes.

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 effectively. M87.373 provides a clear classification for secondary osteonecrosis, enhancing data accuracy for treatment outcomes.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of osteonecrosis, improving the ability to track and manage this condition effectively. M87.373 provides a clear classification for secondary osteonecrosis, enhancing data accuracy for treatment outcomes.

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 causes of secondary osteonecrosis?

Common causes include trauma, corticosteroid use, alcohol abuse, and systemic diseases such as lupus or sickle cell disease.