ICD-10-CM category
M17 Gonarthrosis [arthrosis of knee]
M17 is a category, not a billable code. Report one of the 11 complete codes below.
Codes in M17
- M17.0Bilateral primary osteoarthritis of knee
- M17.10Unilateral primary osteoarthritis, unspecified knee
- M17.11Unilateral primary osteoarthritis, right knee
- M17.12Unilateral primary osteoarthritis, left knee
- M17.2Bilateral post-traumatic osteoarthritis of knee
- M17.30Unilateral post-traumatic osteoarthritis, unspecified knee
- M17.31Unilateral post-traumatic osteoarthritis, right knee
- M17.32Unilateral post-traumatic osteoarthritis, left knee
- M17.4Other bilateral secondary osteoarthritis of knee
- M17.5Other unilateral secondary osteoarthritis of knee
- M17.9Osteoarthritis of knee, unspecified
Outside the US? M17 in the international WHO ICD-10 lists its inclusion and exclusion notes.
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ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.
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