All ICD10 Codes
M08Not billable, use a more specific code below

Juvenile arthritis

In Inflammatory polyarthropathies (M05-M14), chapter 13: Diseases of the Musculoskeletal System and Connective Tissue

125 billable codes under M08: none are a CC or MCC; all map to HCC 93 (Rheumatoid Arthritis and Other Specified Inflammatory Rheumatic Disorders).An HCC counts toward a Medicare Advantage patient's risk score.

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Instructional notes

Excludes1: not coded here, use a different code

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

Code also: add a code for this too, order depends on the encounter

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

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Covers site and laterality, acute injury versus chronic musculoskeletal conditions, 7th characters for pathologic fractures, osteoporosis with or without current fracture, and multisystem inflammatory syndrome.

Read Section I.C.13 (page 60)

All codes under M08

M08 can't be used on a claim. Pick a billable code below; grey headings group them.

M08 MS-DRGs

As the principal diagnosis, all 125 billable codes under M08 group to MS-DRG 545, 546, or 547 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

Other codes that refer to M08

Notes on these codes point to M08.

  • M05 Excludes1: juvenile rheumatoid arthritis (M08.-)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Juvenile Arthritis

Juvenile arthritis (JA) is arthritis that happens in children. It causes joint inflammation (swelling), pain, stiffness, and loss of motion. Joints are places where two bones meet, such as your elbow or knee. It can affect any joint, but it is more common in the knees, hands, and feet.

Read more about juvenile arthritis on MedlinePlus

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.