ICD-10 Code M05.379 – Rheumatoid heart disease with rheumatoid arthritis of unspecified ankle and foot (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.379 – Rheumatoid heart disease with rheumatoid arthritis of unspecified ankle and foot
What it is
This code identifies rheumatoid heart disease occurring with rheumatoid arthritis affecting an unspecified ankle and foot. Use it when the record links the cardiac involvement and the joint disease to rheumatoid arthritis.
Clinical signs
Clinical features vary; refer to documentation. Typical records may describe rheumatoid arthritis in the ankle or foot, along with documented cardiac involvement attributed to rheumatoid disease.
When to use this code
Use this code when the provider clearly documents rheumatoid heart disease and rheumatoid arthritis involving an unspecified ankle and foot. It is appropriate when laterality or a more specific joint site is not stated. If the note does not connect the heart disease to rheumatoid arthritis, check documentation.
Do not use for
Do not use this code for rheumatoid arthritis without heart involvement, or for heart disease not documented as rheumatoid-related. Also avoid it when a more specific ankle or foot site is recorded.
Coding tip
Confirm both the cardiac diagnosis and the unspecified ankle or foot involvement are explicitly documented before assigning M05.379.