M17
ICD-10Non-billable categoryOsteoarthritis of knee
Official ICD-10-CM descriptor (FY2026)
Osteoarthritis of knee
M17 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
More specific codes under M17
- M17.0Bilateral primary osteoarthritis of knee
- M17.1Unilateral primary osteoarthritis of kneecategory
- M17.2Bilateral post-traumatic osteoarthritis of knee
- M17.3Unilateral post-traumatic osteoarthritis of kneecategory
- M17.4Other bilateral secondary osteoarthritis of knee
- M17.5Other unilateral secondary osteoarthritis of knee
- M17.9Osteoarthritis of knee, unspecified
Where this code sits
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.