ICD-10 Code M05.841 – Other rheumatoid arthritis with rheumatoid factor of right hand (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.841 – Other rheumatoid arthritis with rheumatoid factor of right hand
What it is
M05.841 identifies rheumatoid arthritis affecting the right hand, with a positive rheumatoid factor, when the condition does not fit a more specific rheumatoid arthritis code. Use it for documented rheumatoid disease limited to, or specifically involving, the right hand.
Clinical signs
Typical findings include inflammatory joint pain, swelling, stiffness, and reduced hand function. Clinical features vary; refer to documentation for the exact joints involved and whether rheumatoid factor positivity is recorded.
When to use this code
Use this code when the provider documents rheumatoid arthritis with rheumatoid factor affecting the right hand and the record does not support a more specific rheumatoid arthritis category. It is appropriate for confirmed right-hand involvement in established rheumatoid disease. Check documentation if laterality or joint detail is unclear.
Do not use for
Do not use it for rheumatoid arthritis without rheumatoid factor, or when the left hand or both hands are documented instead. If the chart does not clearly support rheumatoid factor positivity, check documentation.
Coding tip
Confirm both the rheumatoid factor status and right-hand laterality before assigning M05.841.