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Compare/M05 vs M08

M05 vs M08

M05 (Rheumatoid arthritis with rheumatoid factor) compared with M08 (Juvenile arthritis), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.

Can these codes be reported together?

No — do not report together. M05 carries an Excludes1 note covering M08: “juvenile rheumatoid arthritis (M08.-)”

Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Side by side

M05Rheumatoid arthritis with rheumatoid factorM08Juvenile arthritis
Billing statusNon-billable header

Report instead: M05.00, M05.011, M05.012, M05.019, M05.021

Non-billable header

Report instead: M08.00, M08.011, M08.012, M08.019, M08.021

ClassificationM00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99)M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99)
DefinitionRheumatoid arthritis with rheumatoid factor is a non-billable ICD-10-CM category code (M05).Juvenile arthritis is a non-billable ICD-10-CM category code (M08).
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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources