The cost of a single rheumatoid factor test is less than 100 yuan, and the cost of a full set of rheumatology tests that include the rheumatoid factor is about 500 yuan, which may vary depending on the region, hospital, and testing instrument. 1. Rheumatoid factor is usually checked by blood sampling, and the cost of a single rheumatoid factor test is within 100 yuan, while the cost of a full set of rheumatology tests containing rheumatoid factor is around 500 yuan. The higher the rheumatoid factor level, the greater the likelihood that the patient has a rheumatic disease. 2. Rheumatoid factor is an antibody against the immunoglobulin IgG. Normal human lymphoid tissue usually has B-lymphocytes that express Rheumatoid Factor on the cell surface, and Rheumatoid Factor is not usually detected in the circulation when there is a lack of antigenic stimulation. 3. Rheumatoid factor testing is primarily used for the diagnosis and prognosis of rheumatoid arthritis; however, rheumatoid factor can also be seen in patients with other rheumatic diseases and other conditions, including acute and chronic infections, as well as oncologic diseases. If you need to do the rheumatoid factor test need to go to a regular hospital, by the professional doctor to prescribe the relevant examination, the specific cost is recommended to consult the local hospital.