M17.12
✓ Billable
Unilateral primary osteoarthritis, left knee
ICD-10-CM · FY2026 · Diseases of the Musculoskeletal System and Connective Tissue
Code
M17.12
System
ICD-10-CM
Billable
Yes — valid for submission
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 M17.12?
ICD-10-CM code M17.12 represents Unilateral primary osteoarthritis, left knee. It is a billable diagnosis code in the Diseases of the Musculoskeletal System and Connective Tissue chapter, effective October 1, 2025 – September 30, 2026.
Is M17.12 billable?
Yes. M17.12 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is M17.12 in?
M17.12 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
M17.1
Unilateral primary osteoarthritis of knee
Non-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
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