ICD-10 Code M06.022 – Rheumatoid arthritis without rheumatoid factor, left elbow (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M06.022 – Rheumatoid arthritis without rheumatoid factor, left elbow
What it is
This code identifies rheumatoid arthritis affecting the left elbow in a patient whose rheumatoid factor is not documented as positive. Use it when the diagnosis is specific to that joint and serology does not support rheumatoid factor positivity.
Clinical signs
Typical findings include inflammatory joint pain, swelling, stiffness, and reduced elbow motion. Clinical features vary; refer to documentation for laterality, joint involvement, and any confirmed serologic status.
When to use this code
Assign this code when the provider documents rheumatoid arthritis of the left elbow and states rheumatoid factor is absent, negative, or not present. It also applies when the note clearly links the condition to the left elbow only. Check documentation if the joint, side, or serology is unclear.
Do not use for
Do not use this code for rheumatoid arthritis with positive rheumatoid factor or when the affected side is not the left elbow. Do not guess the diagnosis if the record only says arthritis or joint pain.
Coding tip
Verify both laterality and rheumatoid factor status in the provider note before coding.