ICD-10-CM 2027 diagnosis code

M08.4Pauciarticular juvenile rheumatoid arthritis

Not billable — use a more specific code

M08.4 is a header code, so it can't be reported by itself. Choose one of the 10 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About M08.4

M08.4 is the ICD-10-CM diagnosis code for Pauciarticular juvenile rheumatoid arthritis. It belongs to category M08 (juvenile arthritis), block M05-M14 (inflammatory polyarthropathies) and chapter 13 (diseases of the musculoskeletal system and connective tissue). It is a header code, so it can't be reported by itself; one of its 10 subcodes must be used instead.

Within M08 (juvenile arthritis), M08.4 is specifically for Pauciarticular juvenile rheumatoid arthritis. Related codes cover unspecified juvenile rheumatoid arthritis (M08.0), juvenile ankylosing spondylitis (M08.1), juvenile rheumatoid arthritis with systemic onset (M08.2), juvenile rheumatoid polyarthritis (seronegative) (M08.3), other juvenile arthritis (M08.8) and unspecified (M08.9).

To report this condition, pick the subcode that matches the documentation: M08.40 (unspecified site), M08.41 (shoulder), M08.42 (elbow), M08.43 (wrist), M08.44 (hand), M08.45 (hip), M08.46 (knee), M08.47 (ankle and foot) and 2 more.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under M08.4

Notes that apply from higher levels

Instructions written at a parent level also apply to M08.4.

› From M08 Juvenile arthritis

Excludes1

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.-)

Broader instructions also apply from Chapter 13: Diseases of the musculoskeletal system and connective tissue.

Code history

2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about M08.4

Is M08.4 billable?: No. M08.4 is a header code. Report one of its more specific subcodes instead.