ICD-10 Code M06.021 – Rheumatoid arthritis without rheumatoid factor, right elbow (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M06.021 – Rheumatoid arthritis without rheumatoid factor, right elbow
What it is
This code identifies rheumatoid arthritis affecting the right elbow when rheumatoid factor is not documented or is negative. Use it for an inflammatory joint disease localized to that side.
Clinical signs
Typical findings include joint pain, swelling, stiffness, and reduced motion in the right elbow. Clinical features vary; refer to documentation for evidence of rheumatoid arthritis and the absence of rheumatoid factor.
When to use this code
Use M06.021 when the record clearly states rheumatoid arthritis without rheumatoid factor and specifies the right elbow as the affected joint. It fits outpatient, inpatient, or specialist notes that localize the condition to that side. Check documentation if the diagnosis is described more generally or if laterality is missing.
Do not use for
Do not use this code for rheumatoid arthritis involving another joint, both elbows, or unspecified elbow laterality. Also avoid it when the chart does not support rheumatoid arthritis without rheumatoid factor.
Coding tip
Verify both the serologic status and the right-sided joint location before assigning this code.