M17.1 (Unilateral primary osteoarthritis of knee) is an umbrella ICD-10-CM medical diagnosis code in the Diseases of the musculoskeletal system and connective tissue chapter. It identifies cases of unilateral primary osteoarthritis of knee for clinical documentation, billing and epidemiological tracking.

ICD-10-CM · Category

M17.1 — Unilateral primary osteoarthritis of knee

Chapter M00-M99: Diseases of the musculoskeletal system and connective tissue

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Sub-codes under M17.1

M17.10Unilateral primary osteoarthritis, unspecified kneeM17.11Unilateral primary osteoarthritis, right kneeM17.12Unilateral primary osteoarthritis, left knee

Related diagnoses

M17.0Bilateral 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 kneeM17.9Osteoarthritis of knee, unspecified

Common questions about M17.1 (Unilateral primary osteoarthritis of knee)

What does ICD-10 code M17.1 mean?
M17.1 is the ICD-10-CM 2025 code for Unilateral primary osteoarthritis of knee. 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 M17.1 a billable diagnosis code?
M17.1 is a category-level (umbrella) code rather than a billable specific code. For billing purposes, clinicians typically use a more specific sub-code under M17.1. Browse the sub-codes listed on this page.
Which ICD-10 chapter does M17.1 belong to?
M17.1 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 Unilateral primary osteoarthritis of knee?
For a plain-language explanation of Unilateral primary osteoarthritis of knee, ask GoDavaii's Health AI - it explains medical conditions in 22+ Indian languages, free, with no signup. Tap "Ask GoDavaii AI about Unilateral primary osteoarthritis of knee" 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 ↗