2026 ICD-10-CM Diagnosis Code M08Juvenile arthritis

ICD-10-CM Codes›M00–M99›M05-M14›M08

ICD-10-CM M08
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M08 is a non-billable ICD-10-CM category code for juvenile arthritis, so it cannot be submitted on claims. Use a more specific code from this category instead, such as M08.00, M08.011, M08.012, and M08.019.

Code Identity

ICD-10-CM Code
M08
Billable Status
No — Non-Billable Category
Code Describes
Juvenile arthritis
Chapter
M05-M14
Inflammatory polyarthropathies

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM05-M14Inflammatory polyarthropathies
CategoryM08Juvenile arthritis
This CodeM08Juvenile arthritis

Specific Coding for Juvenile arthritisOverview

Non-specific codes like M08 require more characters. Use one of these billable codes instead:

  • M08.0 for Unspecified juvenile rheumatoid arthritis

  • Use M08.00 for Unspecified juvenile rheumatoid arthritis of unspecified site

  • M08.01 for Unspecified juvenile rheumatoid arthritis, shoulder

  • M08.02 for Unspecified juvenile rheumatoid arthritis of elbow

  • M08.03 for Unspecified juvenile rheumatoid arthritis, wrist

  • M08.04 for Unspecified juvenile rheumatoid arthritis, hand

  • M08.05 for Unspecified juvenile rheumatoid arthritis, hip

  • M08.06 for Unspecified juvenile rheumatoid arthritis, knee

  • M08.07 for Unspecified juvenile rheumatoid arthritis, ankle and foot

  • Use M08.08 for Unspecified juvenile rheumatoid arthritis, vertebrae

  • Use M08.09 for Unspecified juvenile rheumatoid arthritis, multiple sites

  • Use M08.0A for Unspecified juvenile rheumatoid arthritis, other specified site

  • Use M08.1 for Juvenile ankylosing spondylitis

  • M08.2 for Juvenile rheumatoid arthritis with systemic onset

  • Use M08.20 for Juvenile rheumatoid arthritis with systemic onset, unspecified site

  • M08.21 for Juvenile rheumatoid arthritis with systemic onset, shoulder

  • M08.22 for Juvenile rheumatoid arthritis with systemic onset, elbow

  • M08.23 for Juvenile rheumatoid arthritis with systemic onset, wrist

  • M08.24 for Juvenile rheumatoid arthritis with systemic onset, hand

  • M08.25 for Juvenile rheumatoid arthritis with systemic onset, hip

  • M08.26 for Juvenile rheumatoid arthritis with systemic onset, knee

  • M08.27 for Juvenile rheumatoid arthritis with systemic onset, ankle and foot

  • Use M08.28 for Juvenile rheumatoid arthritis with systemic onset, vertebrae

  • Use M08.29 for Juvenile rheumatoid arthritis with systemic onset, multiple sites

  • Use M08.2A for Juvenile rheumatoid arthritis with systemic onset, other specified site

  • Use M08.3 for Juvenile rheumatoid polyarthritis (seronegative)

  • M08.4 for Pauciarticular juvenile rheumatoid arthritis

  • Use M08.40 for Pauciarticular juvenile rheumatoid arthritis, unspecified site

  • M08.41 for Pauciarticular juvenile rheumatoid arthritis, shoulder

  • M08.42 for Pauciarticular juvenile rheumatoid arthritis, elbow

  • M08.43 for Pauciarticular juvenile rheumatoid arthritis, wrist

  • M08.44 for Pauciarticular juvenile rheumatoid arthritis, hand

  • M08.45 for Pauciarticular juvenile rheumatoid arthritis, hip

  • M08.46 for Pauciarticular juvenile rheumatoid arthritis, knee

  • M08.47 for Pauciarticular juvenile rheumatoid arthritis, ankle and foot

  • Use M08.48 for Pauciarticular juvenile rheumatoid arthritis, vertebrae

  • Use M08.4A for Pauciarticular juvenile rheumatoid arthritis, other specified site

  • M08.8 for Other juvenile arthritis

  • Use M08.80 for Other juvenile arthritis, unspecified site

  • M08.81 for Other juvenile arthritis, shoulder

  • M08.82 for Other juvenile arthritis, elbow

  • M08.83 for Other juvenile arthritis, wrist

  • M08.84 for Other juvenile arthritis, hand

  • M08.85 for Other juvenile arthritis, hip

  • M08.86 for Other juvenile arthritis, knee

  • M08.87 for Other juvenile arthritis, ankle and foot

  • Use M08.88 for Other juvenile arthritis, other specified site

  • Use M08.89 for Other juvenile arthritis, multiple sites

  • M08.9 for Juvenile arthritis, unspecified

  • Use M08.90 for Juvenile arthritis, unspecified, unspecified site

  • M08.91 for Juvenile arthritis, unspecified, shoulder

  • M08.92 for Juvenile arthritis, unspecified, elbow

  • M08.93 for Juvenile arthritis, unspecified, wrist

  • M08.94 for Juvenile arthritis, unspecified, hand

  • M08.95 for Juvenile arthritis, unspecified, hip

  • M08.96 for Juvenile arthritis, unspecified, knee

  • M08.97 for Juvenile arthritis, unspecified, ankle and foot

  • Use M08.98 for Juvenile arthritis, unspecified, vertebrae

  • Use M08.99 for Juvenile arthritis, unspecified, multiple sites

  • Use M08.9A for Juvenile arthritis, unspecified, other specified site

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Code Also

  • any associated underlying condition, such as:
  • regional enteritis Crohn's disease K50
  • ulcerative colitis K51

Type 1 Excludes

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

Patient EducationClinical

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.

The full article covers:

  • What is juvenile arthritis?
  • Who is more likely to get juvenile arthritis?
  • What causes juvenile arthritis?
  • What are the symptoms of juvenile arthritis?
  • How is juvenile arthritis diagnosed?
  • What are the treatments for juvenile arthritis?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About M08Overview

Is M08 (Juvenile arthritis) a billable code?

No. This is a category header that groups the codes for juvenile arthritis, and headers cannot be submitted on claims. Claims for juvenile arthritis need a more specific code from this category, such as M08.00, M08.011, and M08.012.