Elevated RF is found in collagen vascular diseases such as SLE, rheumatoid arthritis, scleroderma, Sjögren’s Syndrome, and in other conditions such as leprosy, tuberculosis, syphilis, malignancy, thyroid disease and in a significant percentage of otherwise normal elderly patients. This is a non-fasting test that reports in 2-3 business days. Please be advised that our services are strictly self-pay and not eligible for submission as a claim to your health insurance provider, medical bill sharing company, Medicare/Medicaid or other third-party payor.  4418