M87.366: Other secondary osteonecrosis, unspecified fibula
M87.366 is the billable ICD-10-CM diagnosis code for Other secondary osteonecrosis, unspecified fibula. It is a fully specified code, so it can be reported on a claim (subject to clinical documentation and your payer's rules).
Frequently asked questions
What is ICD-10-CM code M87.366?
M87.366 is the ICD-10-CM diagnosis code for Other secondary osteonecrosis, unspecified fibula. It belongs to category M87 (Osteonecrosis).
Is M87.366 a billable code?
Yes. M87.366 is a billable, fully specified ICD-10-CM code, so it can be used on a claim (subject to documentation and payer rules).
What category does M87.366 belong to?
M87.366 is part of ICD-10-CM category M87 — Osteonecrosis, which has 434 billable codes.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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