M17.9
ICD-10BillableOsteoarthritis of knee, unspecified
Official ICD-10-CM descriptor (FY2026)
Osteoarthritis of knee, unspecified
M17.9 is valid for submission on a claim — CMS flags it as a billable, specific code.
Related codes in 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
Where this code sits
- Parent code
- M17
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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.