Rheumatoid arthritis without rheumatoid factor, right elbow

This code signifies a diagnosis of rheumatoid arthritis affecting the right elbow, specifically in cases where rheumatoid factor (RF) is not detected in the patient's blood. This form of rheumatoid arthritis is seronegative, meaning the characteristic autoantibody is absent, but the patient still exhibits inflammatory joint disease.

Use this code when the physician's documentation clearly states a diagnosis of rheumatoid arthritis involving the right elbow, and laboratory results confirm the absence of rheumatoid factor. This typically applies to patients presenting with chronic inflammatory arthritis symptoms in the right elbow, where serological testing for RF is negative.

• Ensure documentation specifies "without rheumatoid factor" or "seronegative" for the rheumatoid arthritis diagnosis.
• Verify the laterality is explicitly stated as "right elbow" in the medical record.
• Do not use this code if rheumatoid factor is positive; instead, use the appropriate seropositive rheumatoid arthritis code.