Osteoarthritis of knee
In Osteoarthritis (M15-M19), chapter 13: Diseases of the Musculoskeletal System and Connective Tissue
11 billable codes under M17: none are a CC or MCC; none map to an HCC.
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Instructional notes
Also applies, from Osteoarthritis (M15-M19)
These notes sit on M15-M19 and apply to every code under it, including M17.
Excludes2: not included here, code separately if applicable
- osteoarthritis of spine (M47.-)
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Covers site and laterality, acute injury versus chronic musculoskeletal conditions, 7th characters for pathologic fractures, osteoporosis with or without current fracture, and multisystem inflammatory syndrome.
- Site and laterality (page 60)
- Acute traumatic versus chronic or recurrent musculoskeletal conditions (page 61)
- Coding of Pathologic Fractures (page 61)
- Osteoporosis (page 61)
- Multisystem Inflammatory Syndrome (page 62)
All codes under M17
M17 can't be used on a claim. Pick a billable code below; grey headings group them.
- M17.0Bilateral primary osteoarthritis of knee
- M17.1Unilateral primary osteoarthritis of knee
- M17.10Unilateral primary osteoarthritis, unspecified knee
- M17.11Unilateral primary osteoarthritis, right knee
- M17.12Unilateral primary osteoarthritis, left knee
- M17.2Bilateral post-traumatic osteoarthritis of knee
- M17.3Unilateral post-traumatic osteoarthritis of knee
- M17.30Unilateral post-traumatic osteoarthritis, unspecified knee
- M17.31Unilateral post-traumatic osteoarthritis, right knee
- M17.32Unilateral post-traumatic osteoarthritis, left knee
- M17.4Other bilateral secondary osteoarthritis of knee
- M17.5Other unilateral secondary osteoarthritis of knee
- M17.9Osteoarthritis of knee, unspecified
M17 MS-DRGs
As the principal diagnosis, all 11 billable codes under M17 group to MS-DRG 553 or 554 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
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.
Read more about osteoarthritis on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.