M08.90 – Juvenile arthritis, unspecified, unspecified site

ICD-10-CM 2027 diagnosis code · Inflammatory polyarthropathies

Billable code

ICD-10-CM code M08.90

Code: M08.90 (claims format: M0890)
Description: Juvenile arthritis, unspecified, unspecified site
Billable: Yes – valid for HIPAA-covered transactions
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 › M08.9

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.-)

M08.9 – Juvenile arthritis, unspecified

Excludes1 (not coded here):

juvenile rheumatoid arthritis, unspecified (M08.0-)

Index terms for M08.90

Entries in the ICD-10-CM alphabetic index that lead to this code:

Arthritis, arthritic, juvenile

Related codes in M08.9

Frequently asked questions

What is ICD-10 code M08.90?

M08.90 is the ICD-10-CM code for juvenile arthritis, unspecified, unspecified site, in the block M05-M14 (Inflammatory polyarthropathies).

Is M08.90 a billable code?

Yes. M08.90 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does M08.90 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.