ICD-10 Code M05.769 – Rheumatoid arthritis with rheumatoid factor of unspecified knee without organ or systems involvement (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.769 – Rheumatoid arthritis with rheumatoid factor of unspecified knee without organ or systems involvement
What it is
This code identifies rheumatoid arthritis affecting an unspecified knee, with rheumatoid factor present, and no documented organ or system involvement. Use it when the record specifies the knee but does not identify right or left.
Clinical signs
Typical findings include inflammatory knee pain, swelling, stiffness, and reduced range of motion. Clinical features vary; refer to documentation for evidence of rheumatoid factor positivity and any note that systemic involvement is absent.
When to use this code
Use this code when the provider documents rheumatoid arthritis with rheumatoid factor involving a knee and does not specify laterality. It also requires that no organ or system complications are recorded. If the chart names a right or left knee, choose the laterality-specific code instead.
Do not use for
Do not use it for rheumatoid arthritis without rheumatoid factor, other joints, or knee pain without a confirmed rheumatoid arthritis diagnosis. Check documentation if organ or system involvement is mentioned, since that changes the code selection.
Coding tip
Confirm both rheumatoid factor positivity and the absence of systemic involvement before assigning M05.769.