M08.861 — Other juvenile arthritis, right knee
M08.861 is a billable, specific ICD-10-CM code for other juvenile arthritis, right knee. It is valid for submission on a claim.
Excludes1 inherited from the categories above M08.861
These are not written on M08.861, but they bind it: a note on a category applies to every code beneath it. Billing M08.861 with anything listed here is a denial.
Other codes that can never be billed with M08.861
These codes carry an Excludes1 note pointing at M08.861. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading M08.861 alone.
- M05Rheumatoid arthritis with rheumatoid factor
Risk adjustment
M08.861 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 93 Rheumatoid Arthritis and Other Specified Inflammatory Rheumatic Disorders0.617 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.
Medicare coverage
M08.861 is named in 25 Medicare coverage policies — 18 listing it as supporting medical necessity, and 7 listing it as NOT covered. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A58865Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
- A58883Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
- A58893Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
- A59374Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
Code history
M08.861 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Related codes at this level
Codes that share M08.86. If M08.861 is not quite right, the correct code is usually one of these.
Questions about M08.861
- Is M08.861 a billable ICD-10-CM code?
- Yes. M08.861 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does M08.861 sit in the tabular list?
- Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Inflammatory polyarthropathies (M05-M14).
- What cannot be coded together with M08.861?
- M08.861 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above M08.861 (M08) and apply to it just the same.