ICD-10 Code M05.331 – Rheumatoid Heart Disease with Rheumatoid Arthritis of Right Wrist (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.331 – Rheumatoid heart disease with rheumatoid arthritis of right wrist
What it is
This code identifies rheumatoid arthritis affecting the right wrist in a patient who also has rheumatoid heart disease. Use it when both the joint disease and cardiac involvement are documented together.
Clinical signs
Typical findings include chronic inflammatory wrist pain, swelling, stiffness, and reduced motion. Rheumatoid heart disease may be documented by cardiac abnormalities linked to rheumatoid arthritis; clinical features vary, refer to documentation.
When to use this code
Use this code when the record clearly states rheumatoid heart disease and rheumatoid arthritis of the right wrist. It fits outpatient, inpatient, or specialist notes that link both conditions to the same patient.
If the chart only mentions rheumatoid arthritis without cardiac involvement, choose a different code. If laterality is not specified, check documentation before assigning a right-wrist code.
Do not use for
Do not use this code for isolated right wrist rheumatoid arthritis without heart disease. Also avoid it when the wrist side is not confirmed or when the cardiac condition is unrelated to rheumatoid arthritis.
Coding tip
Verify both the rheumatoid heart disease and right-sided wrist involvement are explicitly documented before coding M05.331.