ICD-10 Code M05.721 – Rheumatoid arthritis with rheumatoid factor of right elbow without organ or systems involvement (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.721 – Rheumatoid arthritis with rheumatoid factor of right elbow without organ or systems involvement
What it is
This code identifies rheumatoid arthritis with a positive rheumatoid factor affecting the right elbow only, without documented involvement of other organs or body systems. Use it when the record clearly links the elbow arthritis to rheumatoid disease.
Clinical signs
Typical findings include chronic joint pain, swelling, stiffness, and reduced range of motion in the right elbow. Clinical features vary; refer to documentation for confirmation of rheumatoid factor positivity and absence of extra-articular disease.
When to use this code
Use this code when the provider documents rheumatoid arthritis with rheumatoid factor and specifies the right elbow as the affected site. The note should also indicate there is no organ or systems involvement. If laterality or systemic involvement is unclear, check documentation before coding.
Do not use for
Do not use this code for rheumatoid arthritis without rheumatoid factor, for left or bilateral elbow involvement, or when systemic manifestations are documented. Check documentation if the site or disease type is not explicit.
Coding tip
Verify both the rheumatoid factor status and the exact joint laterality before assigning M05.721.