Buy autoimmune blood tests to measure levels of proteins and antibodies that may be associated with autoimmune disorders like Rheumatoid Arthritis, Lupus, or Sjörgren’s syndrome. After you purchase your own test and schedule an appointment online, visit a Quest Diagnostics location nearby to complete your specimen sample collection. Your lab results will be shared online as soon as they’re available. As part of your purchase, you have the option to discuss your results with an independent physician.