M17
⚠ Non-billable (Header)Osteoarthritis of knee
Diseases of the musculoskeletal system and connective tissue (M00-M99)
⚠️ This is a category header code — not billable. Use a more specific child code below.
✅ No additional coding notes for M17
Child Codes (7)
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 kneeM17.9Osteoarthritis of knee, unspecified
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CodeM17
BillableNo — Header code
CategoryDiseases of the musculoskeletal system and connective tissue (M00-M99)
Excludes10 rule(s)
Excludes20 note(s)
Child codes7
Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)