Is M17.1 a billable ICD-10 code?

No. M17.1 is a non-billable header code. Use a more specific subcategory for claims.

M17.1 ⚠ Non-billable

Unilateral primary osteoarthritis of knee

Q: What is ICD-10 code M17.1?

ICD-10-CM code M17.1 stands for "Unilateral primary osteoarthritis of knee". It is a non-billable header code in the Diseases of the Musculoskeletal System and Connective Tissue chapter, effective FY2026 (Oct 1, 2025 – Sep 30, 2026).

ICD-10-CM · FY2026 · Diseases of the Musculoskeletal System and Connective Tissue

Code

M17.1

System

ICD-10-CM

Billable

No — use specific code

Effective

FY2026

Chapter

Diseases of the Musculoskeletal System and Connective Tissue

Source

CMS / CDC NCHS

⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.

Frequently asked questions

What is ICD-10 code M17.1?

ICD-10-CM code M17.1 represents Unilateral primary osteoarthritis of knee. It is a non-billable header code requiring a more specific subcategory in the Diseases of the Musculoskeletal System and Connective Tissue chapter, effective October 1, 2025 – September 30, 2026.

Is M17.1 billable?

No. M17.1 is a non-billable header. Select a more specific subcategory for claims submission.

What chapter is M17.1 in?

M17.1 belongs to the Diseases of the Musculoskeletal System and Connective Tissue chapter (M00–M99) of ICD-10-CM.

Related codes in the M17 category

M17 Osteoarthritis of knee Non-billable M17.0 Bilateral primary osteoarthritis of knee Billable M17.2 Bilateral post-traumatic osteoarthritis of knee Billable M17.3 Unilateral post-traumatic osteoarthritis of knee Non-billable M17.4 Other bilateral secondary osteoarthritis of knee Billable M17.5 Other unilateral secondary osteoarthritis of knee Billable M17.9 Osteoarthritis of knee, unspecified Billable M17.10 Unilateral primary osteoarthritis, unspecified knee Billable

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