M88.9: Osteitis deformans of unspecified bone
M88.9 is the billable ICD-10-CM diagnosis code for Osteitis deformans of unspecified bone. 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 M88.9?
M88.9 is the ICD-10-CM diagnosis code for Osteitis deformans of unspecified bone. It belongs to category M88 (Osteitis deformans [Paget's disease of bone]).
Is M88.9 a billable code?
Yes. M88.9 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 M88.9 belong to?
M88.9 is part of ICD-10-CM category M88 — Osteitis deformans [Paget's disease of bone], which has 52 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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