RA Factor Test - More Information

The rheumatoid factor test, also known as an RF test, RA factor blood test, RF blood test and rheumatoid arthritis test, measures the RA factor blood level.

Rheumatoid arthritis factor (RA factor) is a type of antibody produced by the immune system. RA factor testing is often done out of the suspicion that one has rheumatoid arthritis as elevated rheumatoid factor levels are detectable in a majority of cases. Rheumatoid factor can also be detected in other collagen vascular diseases such as scleroderma and Sjogren's syndrome which is why it is sometimes ordered with the Sjogren's syndrome test.

To get an RA factor test near you, just order online and get your blood drawn at the selected Quest Diagnostics lab. Once your rheumatoid factor lab report is ready, it will be available for download. As can be seen on the sample RA factor lab results, the rheumatoid factor blood level is reported as a number and can be compared against the reference range provided by the lab.

This rheumatoid factor blood test is also tested in the joint pain test panel.