ICD-10 Code M05.321 – Rheumatoid heart disease with rheumatoid arthritis of right elbow (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.321 – Rheumatoid heart disease with rheumatoid arthritis of right elbow
What it is
This code identifies rheumatoid arthritis affecting the right elbow with associated rheumatoid heart disease. Use it when documentation links both the joint involvement and the cardiac manifestation to rheumatoid disease.
Clinical signs
Findings may include chronic inflammatory arthritis of the right elbow, such as pain, swelling, stiffness, or reduced range of motion. Clinical features vary; refer to documentation for evidence of rheumatoid heart disease.
When to use this code
Use this code when the provider documents rheumatoid heart disease and rheumatoid arthritis specifically involving the right elbow. It is appropriate when both conditions are clearly stated as present and related to rheumatoid disease. Check documentation if the cardiac involvement or joint laterality is unclear.
Do not use for
Do not use this code if rheumatoid heart disease is not documented, or if the arthritis affects a different joint or side. Do not assign it for nonspecific elbow pain or other non-rheumatoid cardiac disease.
Coding tip
Confirm laterality and the explicit link to rheumatoid heart disease before coding.