Osteoarthritis of knee (M17) ICD-10-CM
The M17 code range covers osteoarthritis of knee with 14 ICD-10-CM diagnosis codes. 11 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Codes in the M17 Range 14 codes · 11 billable
- M17 Osteoarthritis of kneeNon-billable
- M17.0 Bilateral primary osteoarthritis of knee
- M17.1 Unilateral primary osteoarthritis of kneeNon-billable
- M17.10 Unilateral primary osteoarthritis, unspecified knee
- M17.11 Unilateral primary osteoarthritis, right knee
- M17.12 Unilateral primary osteoarthritis, left knee
- M17.2 Bilateral post-traumatic osteoarthritis of knee
- M17.3 Unilateral post-traumatic osteoarthritis of kneeNon-billable
- M17.30 Unilateral post-traumatic osteoarthritis, unspecified knee
- M17.31 Unilateral post-traumatic osteoarthritis, right knee
- M17.32 Unilateral post-traumatic osteoarthritis, left knee
- M17.4 Other bilateral secondary osteoarthritis of knee
- M17.5 Other unilateral secondary osteoarthritis of knee
- M17.9 Osteoarthritis of knee, unspecified
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the M17 range.
Osteoarthritis, Knee
Noninflammatory degenerative disease of the knee joint consisting of three large categories: conditions that block normal synchronous movement, conditions that produce abnormal pathways of motion, and conditions that cause stress concentration resulting in changes to articular cartilage. (Crenshaw, Campbell's Operative Orthopaedics, 8th ed, p2019)
About the M17 Code Range
Knee osteoarthritis is a degenerative disease of the knee joint that can change its cartilage.
The codes separate primary osteoarthritis (M17.0 and M17.1), post-traumatic osteoarthritis (M17.2 and M17.3), and other secondary osteoarthritis (M17.4 and M17.5). Each group distinguishes both knees from one knee. The unilateral primary and post-traumatic codes further distinguish right, left, or unspecified knee. M17.9 identifies knee osteoarthritis without those distinctions.
Questions About This Page
How many billable codes are in the M17 range?
Of the 14 codes in this range, 11 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the M17 range classify?
The range classifies osteoarthritis of knee. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
