ICD-10 Code M05.39 – Rheumatoid heart disease with rheumatoid arthritis of multiple sites (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.39 – Rheumatoid heart disease with rheumatoid arthritis of multiple sites
What it is
This code identifies rheumatoid arthritis affecting multiple joints together with rheumatoid heart disease. Use it when the record shows both the systemic inflammatory arthritis and cardiac involvement linked to rheumatoid disease.
Clinical signs
Findings may include polyarticular inflammatory joint pain, swelling, and stiffness, along with documented cardiac manifestations attributed to rheumatoid disease. Clinical features vary; refer to documentation.
When to use this code
Use M05.39 when the provider documents rheumatoid arthritis in multiple sites and specifies rheumatoid heart disease in the same encounter or problem list. It is appropriate for confirmed overlap of joint and cardiac disease, not for suspected involvement. Check documentation if the heart diagnosis is unclear.
Do not use for
Do not use this code for rheumatoid arthritis without heart involvement, or for isolated heart disease without documented rheumatoid arthritis. Do not assign it when the chart only suggests cardiac symptoms without a stated rheumatoid etiology.
Coding tip
Confirm that both rheumatoid heart disease and multiple-site rheumatoid arthritis are explicitly documented before selecting M05.39.