Rheumatoid arthritis without rheumatoid factor, left hand

This code signifies a chronic autoimmune inflammatory disorder primarily affecting the synovial lining of joints, specifically the left hand, in patients who test negative for rheumatoid factor. It indicates the absence of this specific autoantibody, which is often present in other forms of rheumatoid arthritis.

Apply this code when documentation confirms a diagnosis of rheumatoid arthritis affecting the left hand, and laboratory results explicitly state a negative or absent rheumatoid factor. This is appropriate for initial diagnoses and subsequent encounters where the condition of the left hand is being managed.

• Ensure documentation clearly specifies "left hand" and "rheumatoid factor negative" or "seronegative."
• Do not use this code if the rheumatoid factor status is unknown or positive; instead, select an appropriate seropositive or unspecified code.
• Consider additional codes for any associated complications or extra-articular manifestations.