Rheumatoid arthritis without rheumatoid factor, right hip

This code signifies inflammatory arthritis affecting the right hip joint, characterized by the absence of rheumatoid factor in laboratory testing. It indicates a seronegative form of rheumatoid arthritis specifically impacting the articulation between the femur and pelvis on the right side.

Apply this code when a patient presents with clinical signs and symptoms of rheumatoid arthritis, such as pain, swelling, and stiffness in the right hip, and serological tests confirm the absence of rheumatoid factor. Documentation should clearly state a diagnosis of seronegative rheumatoid arthritis affecting the right hip.

• Ensure documentation explicitly states "seronegative" or "without rheumatoid factor" to differentiate from seropositive forms.
• Laterality is crucial; verify the right hip is the affected joint.
• Do not use if the rheumatoid factor is positive or if the arthritis is due to another specific etiology.