ICD-10 Code M05.629 – Rheumatoid arthritis of unspecified elbow with involvement of other organs and systems (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.629 – Rheumatoid arthritis of unspecified elbow with involvement of other organs and systems
What it is
This code identifies rheumatoid arthritis affecting an unspecified elbow and showing involvement beyond the joint, such as other organs or systems. Use it when the elbow site is documented but the exact side is not specified.
Clinical signs
Typical findings include chronic inflammatory joint pain, swelling, stiffness, and reduced elbow motion. Clinical features vary; refer to documentation for evidence of systemic involvement.
When to use this code
Use M05.629 when the record clearly documents rheumatoid arthritis of the elbow and also notes involvement of other organs or systems. It fits cases where the elbow laterality is not stated. Code from the provider’s documentation; do not assume systemic manifestations without support.
Do not use for
Do not use this code for rheumatoid arthritis limited to the joint only, or when the elbow side is documented and a more specific code applies. Check documentation if the systemic involvement is unclear.
Coding tip
Verify both the joint site and the extra-articular involvement before assigning this code.