ICD-10-CM 2027
ICD-10 code for multiple site still's disease or syndrome
From the official ICD-10-CM alphabetic index entry “Still's disease or syndrome (juvenile) › multiple site”. Page updated September 29, 2026.
About coding multiple site still's disease or syndrome
The ICD-10-CM code for multiple site still's disease or syndrome is M08.29 (Juvenile rheumatoid arthritis with systemic onset, multiple sites).
Within M08.2 (juvenile rheumatoid arthritis with systemic onset), M08.29 is specifically for juvenile rheumatoid arthritis with systemic onset, multiple sites. Related codes cover unspecified site (M08.20), shoulder (M08.21), elbow (M08.22), wrist (M08.23), hand (M08.24), hip (M08.25), knee (M08.26), ankle and foot (M08.27) and 2 more.
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 multiple site still's disease or syndrome ICD-10 codes
What is the ICD-10 code for multiple site still's disease or syndrome?
- M08.29 — Juvenile rheumatoid arthritis with systemic onset, multiple sites.
Is M08.29 billable?
- Yes. M08.29 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can M08.29 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict M08.29 as a principal diagnosis.
Is M08.29 a CC or MCC?
- No. M08.29 is neither a CC nor an MCC under MS-DRG v44.0.