ICD-10-CM · Billable Code
M17.9 — Osteoarthritis of knee, unspecified
Chapter M00-M99: Diseases of the musculoskeletal system and connective tissue
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M17.0Bilateral primary osteoarthritis of kneeM17.1Unilateral primary osteoarthritis of kneeM17.2Bilateral post-traumatic osteoarthritis of kneeM17.3Unilateral post-traumatic osteoarthritis of kneeM17.4Other bilateral secondary osteoarthritis of kneeM17.5Other unilateral secondary osteoarthritis of knee
Common questions about M17.9 (Osteoarthritis of knee, unspecified)
What does ICD-10 code M17.9 mean?
M17.9 is the ICD-10-CM 2025 code for Osteoarthritis of knee, unspecified. ICD-10-CM is the medical coding system used by clinicians, hospitals and insurers worldwide to classify diseases and conditions in a standard way.
Is M17.9 a billable diagnosis code?
Yes, M17.9 is a billable / specific ICD-10-CM code, meaning it can be used by clinicians and hospitals as a primary or secondary diagnosis on claims and electronic health records.
Which ICD-10 chapter does M17.9 belong to?
M17.9 belongs to the chapter "Diseases of the musculoskeletal system and connective tissue" (codes M00-M99). ICD-10-CM organises codes into 22 chapters by body system or condition type, which helps clinicians navigate related diagnoses.
Where can I get plain-language information about Osteoarthritis of knee, unspecified?
For a plain-language explanation of Osteoarthritis of knee, unspecified, ask GoDavaii's Health AI - it explains medical conditions in 22+ Indian languages, free, with no signup. Tap "Ask GoDavaii AI about Osteoarthritis of knee, unspecified" above to get a personalised answer.
Source: ICD-10-CM 2025 (Centers for Medicare & Medicaid Services, public domain). Codes valid from October 1, 2024. CMS source ↗