ICD-10 Code M05.621 – Rheumatoid arthritis of right elbow with involvement of other organs and systems (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.621 – Rheumatoid arthritis of right elbow with involvement of other organs and systems
What it is
This code identifies rheumatoid arthritis affecting the right elbow, with documented involvement of other organs or systems. It reflects a systemic autoimmune disease, not isolated joint pain.
Clinical signs
Typical findings include inflammatory joint pain, swelling, stiffness, and reduced motion in the right elbow. Systemic involvement must be supported in the record; clinical features vary, so refer to documentation.
When to use this code
Use this code when the provider documents rheumatoid arthritis in the right elbow and also notes involvement of another organ or body system. The chart should clearly link the elbow arthritis to the systemic rheumatoid process. If the record only shows localized elbow arthritis, this code is not appropriate.
Do not use for
Do not use it for rheumatoid arthritis without right elbow involvement, or for elbow pain without a confirmed rheumatoid diagnosis. Check documentation if another rheumatoid site or a different joint is specified.
Coding tip
Confirm both the right elbow site and the extra-articular involvement before assigning M05.621.