Rheumatoid arthritis without rheumatoid factor, right hand

This code signifies a chronic autoimmune inflammatory disorder primarily affecting the synovial lining of joints, specifically the right hand, in a patient who tests negative for rheumatoid factor. This form of rheumatoid arthritis is often referred to as seronegative rheumatoid arthritis.

Apply this code when documentation confirms a diagnosis of rheumatoid arthritis affecting the right hand, and laboratory results indicate the absence of rheumatoid factor. This is appropriate for patients presenting with characteristic symptoms like joint pain, swelling, and stiffness in the right hand, coupled with a negative rheumatoid factor test.

• Ensure documentation explicitly states "right hand" and "without rheumatoid factor" or "seronegative."
• Do not confuse with seropositive rheumatoid arthritis (M05.-) or other forms of inflammatory arthritis.
• Always sequence this code as a primary diagnosis when it is the reason for the encounter.