2027 ICD-10-CM Diagnosis Code M08Juvenile arthritis

ICD-10-CM Codes›M00–M99›M05-M14›M08

ICD-10-CM M08
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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
Short Description
Juvenile arthritis
Same as the full description in the CMS dataset.
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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to M08: its own notes plus those printed at block M00-M25 and Chapter 13. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Block M00-M25 applies to 2,249 codes
  • Disorders affecting predominantly peripheral (limb) joints

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

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

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 13 (M00-M99) Diseases of the musculoskeletal system and connective tissue applies to 6,687 codes
  • arthropathic psoriasis (L40.5-)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • compartment syndrome (traumatic) (T79.A-)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Code Also

A second code may be needed to fully describe the condition; the note gives no sequencing direction.

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

Notes

General instructions on how these codes are used.

From Chapter 13 (M00-M99) Diseases of the musculoskeletal system and connective tissue applies to 6,687 codes
  • Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name M08, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming M08: they are not reported together with it, unless the two conditions are unrelated.

  • M05 Rheumatoid arthritis with rheumatoid factor
    juvenile rheumatoid arthritis (M08.-)

Clinical InformationClinical

  • Arthritis, Juvenile

    arthritis in children, with onset before 16 years of age. the terms juvenile rheumatoid arthritis (jra) and juvenile idiopathic arthritis (jia) refer to classification systems for chronic arthritis in children. only one subtype of juvenile arthritis (polyarticular-onset, rheumatoid factor-positive) clinically resembles adult rheumatoid arthritis and is considered its childhood equivalent.

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About M08Overview

What is the ICD-10 code for juvenile arthritis?

M08 is the ICD-10-CM category for juvenile arthritis, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.

Can M08 be reported with M14.8?

Not as a rule. The Excludes1 note on M08 lists "arthropathy in Whipple's disease (M14.8)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).