M17

Non-billable

Osteoarthritis of knee

M17 is the ICD-10-CM code for Osteoarthritis of knee. It is a non-billable category code — use a more specific child code such as M17.0 for billing.

Status
Header (non-billable)
Chapter
M00-M99
Subcodes
7
Edition
FY2026

M00-M99 Diseases of the musculoskeletal system and connective tissue

What this means — in plain language

MedlinePlus · NIH

What is osteoarthritis? Osteoarthritis, sometimes called OA, is a type of arthritis that only affects the joints, usually in the hands, knees, hips, neck, and lower back. It's the most common type of arthritis. In a healthy joint, the ends of the bones are covered with a smooth, slippery tissue called cartilage. The cartilage pads the bones and helps them glide easily when you move the joint. With osteoarthritis,…

Read more about Osteoarthritis at MedlinePlus ↗

Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.

No additional coding notes for this code.

Frequently asked questions

What is ICD-10 code M17?
M17 is the ICD-10-CM code for "Osteoarthritis of knee". It falls under M00-M99 Diseases of the musculoskeletal system and connective tissue.
Is M17 a billable code?
No — M17 is a non-billable header code. Use a more specific child code (such as M17.0) for billing.
What are the subcodes of M17?
M17 has 7 more specific child codes, including M17.0, M17.1, M17.2.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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