M17 – Osteoarthritis of knee
ICD-10-CM 2027 diagnosis code · Osteoarthritis
ICD-10-CM code
M17
- Code
M17(claims format:M17)- Description
- Osteoarthritis of knee
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 13. Diseases of the musculoskeletal system and connective tissue (M00-M99)
- Block
- M15-M19 Osteoarthritis
Billable codes under M17
M17 is a header code and cannot be used on claims. Choose the most specific code:
- M17.0 – Bilateral primary osteoarthritis of kneeBillable
- M17.1 – Unilateral primary osteoarthritis of kneeHeader (more codes below)
- M17.2 – Bilateral post-traumatic osteoarthritis of kneeBillable
- M17.3 – Unilateral post-traumatic osteoarthritis of kneeHeader (more codes below)
- M17.4 – Other bilateral secondary osteoarthritis of kneeBillable
- M17.5 – Other unilateral secondary osteoarthritis of kneeBillable
- M17.9 – Osteoarthritis of knee, unspecifiedBillable
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
Block M15-M19
Excludes2 (not included here):
- osteoarthritis of spine (M47.-)
Frequently asked questions
What is ICD-10 code M17?
M17 is the ICD-10-CM code for osteoarthritis of knee, in the block M15-M19 (Osteoarthritis).
Is M17 a billable code?
No. M17 is a header code with more specific child codes; report one of the billable codes listed above.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.