ICD-10 Code M06.069 – Rheumatoid arthritis without rheumatoid factor, unspecified knee (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M06.069 – Rheumatoid arthritis without rheumatoid factor, unspecified knee
What it is
This code identifies rheumatoid arthritis affecting an unspecified knee, with no rheumatoid factor documented. Use it when the record confirms rheumatoid arthritis but does not specify the exact knee side.
Clinical signs
Typical findings include chronic joint pain, swelling, stiffness, and reduced range of motion in the knee. Clinical features vary; refer to documentation for laterality and rheumatoid factor status.
When to use this code
Use this code when the provider documents rheumatoid arthritis in the knee and specifically states rheumatoid factor is absent or seronegative. Choose it when the knee is not identified as right or left, or when laterality is unclear in the note.
It also fits follow-up visits where the diagnosis remains active and the documentation supports ongoing knee involvement. If the chart names a different joint, a specific knee side, or another arthritis type, code that instead.
Do not use for
Do not use it for rheumatoid arthritis with rheumatoid factor, or when the diagnosis is limited to another joint. Do not assign it if the record does not support rheumatoid arthritis; check documentation.
Coding tip
Verify both the serologic status and knee laterality before assigning M06.069.