Is M08.86 a billable ICD-10-CM code?

No. M08.86 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does M08.86 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 M08.86?

M08.86 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 M08.86 (M08) and apply to it just the same.

M08.86

M08.86 — Other juvenile arthritis, knee

Non-billable headerICD-10-CM

M08.86 is a non-billable header ICD-10-CM code for other juvenile arthritis, knee. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 inherited from the categories above M08.86

These are not written on M08.86, but they bind it: a note on a category applies to every code beneath it. Billing M08.86 with anything listed here is a denial.

Written on M08 — Juvenile arthritis

arthropathy in Whipple's disease (M14.8)
Felty's syndrome (M05.0)
juvenile dermatomyositis (M33.0-)
psoriatic juvenile arthropathy (L40.54)

Other codes that can never be billed with M08.86

These codes carry an Excludes1 note pointing at M08.86. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading M08.86 alone.

M05Rheumatoid arthritis with rheumatoid factor

Risk adjustment

M08.86 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code history

M08.86 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Code to one of these instead M08.86

3 child codes. Green means billable.

Related codes at this level

Codes that share M08.8. If M08.86 is not quite right, the correct code is usually one of these.

Questions about M08.86

Is M08.86 a billable ICD-10-CM code?: No. M08.86 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does M08.86 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 M08.86?: M08.86 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 M08.86 (M08) and apply to it just the same.