M08.9 – Juvenile arthritis, unspecified

ICD-10-CM 2027 diagnosis code · Inflammatory polyarthropathies

Non-billable header

ICD-10-CM code M08.9

Code: M08.9 (claims format: M089)
Description: Juvenile arthritis, unspecified
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: M05-M14 Inflammatory polyarthropathies
Parent codes: M08

Billable codes under M08.9

M08.9 is a header code and cannot be used on claims. Choose the most specific code:

M08.90 – Juvenile arthritis, unspecified, unspecified siteBillable
M08.91 – Juvenile arthritis, unspecified, shoulderHeader (more codes below)
M08.92 – Juvenile arthritis, unspecified, elbowHeader (more codes below)
M08.93 – Juvenile arthritis, unspecified, wristHeader (more codes below)
M08.94 – Juvenile arthritis, unspecified, handHeader (more codes below)
M08.95 – Juvenile arthritis, unspecified, hipHeader (more codes below)
M08.96 – Juvenile arthritis, unspecified, kneeHeader (more codes below)
M08.97 – Juvenile arthritis, unspecified, ankle and footHeader (more codes below)
M08.98 – Juvenile arthritis, unspecified, vertebraeBillable
M08.99 – Juvenile arthritis, unspecified, multiple sitesBillable
M08.9A – Juvenile arthritis, unspecified, other specified siteBillable

Notes for M08.9

Excludes1 (not coded here):

juvenile rheumatoid arthritis, unspecified (M08.0-)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

M08 – Juvenile arthritis

Excludes1 (not coded here):

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

Code also:

any associated underlying condition, such as:
regional enteritis [Crohn's disease] (K50.-)
ulcerative colitis (K51.-)

Related codes in M08

Frequently asked questions

What is ICD-10 code M08.9?

M08.9 is the ICD-10-CM code for juvenile arthritis, unspecified, in the block M05-M14 (Inflammatory polyarthropathies).

Is M08.9 a billable code?

No. M08.9 is a header code with more specific child codes; report one of the billable codes listed above.

What category does M08.9 belong to?

It belongs to category M08 – Juvenile arthritis.

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.