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M17.1

Non-billable

Unilateral primary osteoarthritis of knee

M17.1 is the ICD-10-CM code for Unilateral primary osteoarthritis of knee. It is a non-billable category code — use a more specific child code such as M17.10 for billing.

Status
Header (non-billable)
Chapter
M00-M99
Parent
M17
Subcodes
3
Edition
FY2026

M00-M99 Diseases of the musculoskeletal system and connective tissue

Includes

  • •Primary osteoarthritis of knee NOS

Frequently asked questions

What is ICD-10 code M17.1?
M17.1 is the ICD-10-CM code for "Unilateral primary osteoarthritis of knee". It falls under M00-M99 Diseases of the musculoskeletal system and connective tissue.
Is M17.1 a billable code?
No — M17.1 is a non-billable header code. Use a more specific child code (such as M17.10) for billing.
What are the subcodes of M17.1?
M17.1 has 3 more specific child codes, including M17.10, M17.11, M17.12.

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

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