ICD-10-CM 2027
ICD-10 code for juvenile polyarthritis
From the official ICD-10-CM alphabetic index entry “Polyarthritis, polyarthropathy › juvenile (chronic) (seronegative)”. Page updated September 29, 2026.
About coding juvenile polyarthritis
The ICD-10-CM code for juvenile polyarthritis is M08.3 (Juvenile rheumatoid polyarthritis (seronegative)).
Within M08 (juvenile arthritis), M08.3 is specifically for juvenile rheumatoid polyarthritis (seronegative). Related codes cover unspecified juvenile rheumatoid arthritis (M08.0), juvenile ankylosing spondylitis (M08.1), juvenile rheumatoid arthritis with systemic onset (M08.2), Pauciarticular juvenile rheumatoid arthritis (M08.4), other juvenile arthritis (M08.8) and unspecified (M08.9).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 545 (Connective Tissue Disorders with MCC, relative weight 2.3892), DRG 546 (Connective Tissue Disorders with CC, relative weight 1.1745) and DRG 547 (Connective Tissue Disorders without CC/MCC, relative weight 0.7526), in MDC 08 (Diseases and Disorders of the Musculoskeletal System and Connective Tissue), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about juvenile polyarthritis ICD-10 codes
What is the ICD-10 code for juvenile polyarthritis?
- M08.3 — Juvenile rheumatoid polyarthritis (seronegative).
Is M08.3 billable?
- Yes. M08.3 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can M08.3 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict M08.3 as a principal diagnosis.
Is M08.3 a CC or MCC?
- No. M08.3 is neither a CC nor an MCC under MS-DRG v44.0.