ICD-10 Code M05.631 – Rheumatoid arthritis of right wrist with involvement of other organs and systems (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.631 – Rheumatoid arthritis of right wrist with involvement of other organs and systems
What it is
This code identifies rheumatoid arthritis affecting the right wrist, with documented involvement of other organs or body systems. Use it when the record supports both the joint location and systemic disease involvement.
Clinical signs
Typical findings include inflammatory wrist pain, swelling, stiffness, and reduced range of motion. Clinical features vary; refer to documentation for evidence of extra-articular or systemic involvement.
When to use this code
Use this code when the provider documents rheumatoid arthritis in the right wrist and also notes involvement of other organs or systems. The chart should clearly support the laterality and the systemic nature of the disease. If the record is incomplete, check documentation before assigning the code.
Do not use for
Do not use it for rheumatoid arthritis without right-wrist involvement, or for isolated wrist pain without a confirmed diagnosis. Do not assign it when systemic involvement is not documented.
Coding tip
Verify both laterality and extra-articular involvement in the note before coding.