ICD-10 Code M05.3 – Rheumatoid heart disease with rheumatoid arthritis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.3 – Rheumatoid heart disease with rheumatoid arthritis
What it is
This code identifies rheumatoid arthritis with heart involvement attributed to the same autoimmune disease. Use it when the record documents rheumatoid heart disease as a manifestation of rheumatoid arthritis.
Clinical signs
Findings may include cardiac involvement such as pericardial, myocardial, or valvular disease in a patient with rheumatoid arthritis. Clinical features vary; refer to documentation.
When to use this code
Use M05.3 when the provider clearly links heart disease to rheumatoid arthritis in the assessment or problem list. It is appropriate when the note specifies rheumatoid heart disease, rheumatic cardiac involvement, or similar wording tied to rheumatoid arthritis.
Code it only when the documentation supports both rheumatoid arthritis and associated heart disease. Check documentation if the cardiac condition is present but not stated as rheumatoid-related.
Do not use for
Do not use this code for rheumatoid arthritis without cardiac involvement, or for heart disease from another cause. If the record does not connect the heart condition to rheumatoid arthritis, check documentation.
Coding tip
Confirm the provider’s causal link between rheumatoid arthritis and heart disease before assigning M05.3.