NPI Atlas

M08 – Juvenile arthritis

ICD-10-CM 2027 diagnosis code · Inflammatory polyarthropathies

Non-billable header

ICD-10-CM code M08

Code: M08 (claims format: M08)
Description: Juvenile arthritis
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

Billable codes under M08

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

M08.0 – Unspecified juvenile rheumatoid arthritisHeader (more codes below)
M08.1 – Juvenile ankylosing spondylitisBillable
M08.2 – Juvenile rheumatoid arthritis with systemic onsetHeader (more codes below)
M08.3 – Juvenile rheumatoid polyarthritis (seronegative)Billable
M08.4 – Pauciarticular juvenile rheumatoid arthritisHeader (more codes below)
M08.8 – Other juvenile arthritisHeader (more codes below)
M08.9 – Juvenile arthritis, unspecifiedHeader (more codes below)

Notes for M08

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.-)

Frequently asked questions

What is ICD-10 code M08?

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

Is M08 a billable code?

No. M08 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.