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ICD-10 Guide
ICD-10 CodesM87.371

M87.371

Billable

Other secondary osteonecrosis, right ankle

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

Code Description

ICD-10 M87.371 is a billable code used to indicate a diagnosis of other secondary osteonecrosis, right ankle.

Key Diagnostic Point:

Osteonecrosis, also known as avascular necrosis, is a condition characterized by the death of bone tissue due to a lack of blood supply. In the case of M87.371, the osteonecrosis is secondary, meaning it arises as a complication of another underlying condition or factor, such as corticosteroid use, alcohol abuse, or trauma. The right ankle is specifically affected, which can lead to significant pain, limited mobility, and potential joint collapse if not addressed. Patients may present with symptoms such as localized pain, swelling, and difficulty bearing weight on the affected ankle. Diagnosis typically involves imaging studies like MRI or X-rays to visualize bone changes. Treatment options may include conservative management with pain relief, physical therapy, or surgical interventions such as core decompression or joint replacement, depending on the severity of the condition. Accurate coding is essential for proper reimbursement and to reflect the complexity of the patient's condition.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between primary and secondary osteonecrosis.
  • Identifying the underlying cause of the osteonecrosis.
  • Documenting specific anatomical locations accurately.
  • Understanding the implications of associated conditions.

Audit Risk Factors

  • Inadequate documentation of the underlying cause of osteonecrosis.
  • Failure to specify the affected anatomical site.
  • Misclassification of primary versus secondary osteonecrosis.
  • Lack of imaging or clinical evidence to support the diagnosis.

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, history of corticosteroid use, or trauma leading to osteonecrosis.

Billing Considerations

Ensure that the cause of osteonecrosis is clearly documented to support the secondary classification.

Rheumatology

Documentation Requirements

Comprehensive assessment of systemic conditions that may contribute to osteonecrosis, including autoimmune disorders.

Common Clinical Scenarios

Patients with systemic lupus erythematosus or other rheumatologic conditions presenting with joint pain.

Billing Considerations

Document any medications that may contribute to osteonecrosis, such as long-term corticosteroid therapy.

Coding Guidelines

Inclusion Criteria

Use M87.371 When
  • According to ICD
  • 10 coding guidelines, M87
  • 371 should be used when osteonecrosis is confirmed to be secondary and specifically affects the right ankle
  • Coders must ensure that the underlying cause is documented and that the site is specified

Exclusion Criteria

Do NOT use M87.371 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 osteonecrosis cases.

Documentation Requirements

Document the reason for the procedure and the specific joint involved.

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 capture the complexity of the condition and its underlying causes, which is essential for accurate reimbursement and patient care.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of osteonecrosis, improving the ability to capture the complexity of the condition and its underlying causes, which is essential for accurate reimbursement and patient care.

Reimbursement & Billing Impact

reimbursement and patient care.

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 difference between primary and secondary osteonecrosis?

Primary osteonecrosis occurs without an identifiable cause, while secondary osteonecrosis is due to underlying conditions such as trauma, corticosteroid use, or systemic diseases.