A rheumatoid factor test measures the amount of rheumatoid factor in your blood. Rheumatoid factors are proteins produced by your immune system that can attack healthy tissue in your body.
High levels of rheumatoid factor in the blood are most often associated with autoimmune diseases, such as rheumatoid arthritis and Sjogren's syndrome. But rheumatoid factor may be detected in some healthy people, and people with autoimmune diseases sometimes have normal levels of rheumatoid factor.
$79 per year
$6.60 per month billed annually
Use promocode
$79 per year
$250 single payment
$45 per month
Save time on interpreting lab results with the largest database of biomarkers online. In-depth research on any test at your fingertips, all stored and tracked in one place.
Learn MoreAt HealthMatters, we're committed to maintaining the security and confidentiality of your personal information. We've put industry-leading security standards in place to help protect against the loss, misuse, or alteration of the information under our control. We use procedural, physical, and electronic security methods designed to prevent unauthorized people from getting access to this information. Our internal code of conduct adds additional privacy protection. All data is backed up multiple times a day and encrypted using SSL certificates. See our Privacy Policy for more details.
14.3.3 ETA PROTEIN, Acetylcholine Receptor (AChR) Antibody, Activated partial thromboplastin time (APTT), Anti-Smith Antibody, Anticardiolipin Ab,IgG,Qn, Antinuclear Antibodies Direct (ANA Direct), CARDIOLIPIN AB (IGA), CARDIOLIPIN AB (IGG), CARDIOLIPIN AB (IGM), CCP Antibodies IgG/IgA, Complement C3, Complement C3a, Complement C4, Serum, Complement C4a, Complement, Total (CH50), Cyclic Citrullinated Peptide Antibody, Dilute Russell's viper venom time (dRVVT), ds-DNA Antibody, IgG, Erythrocyte Sedimentation Rate (ESR), Histamine, Plasma, HLA-B27 (Human Leukocyte Antigen B27), Immature Grans (Abs), Immature Granulocytes (%), Immunoglobulin A, Qn, Serum, Immunoglobulin D, Quant, Serum, Immunoglobulin E, Total, Immunoglobulin G, Qn, Serum, Immunoglobulin M, Qn, Serum, Interleukin-2, Serum, Interleukin-6, Jo 1 Antibodies, IgG, Serum, Liver-Kidney Microsomal Antibodies, Lupus Anticoagulant, PHOSPHATIDYLETHANOLAMINE AB (IGA), PHOSPHATIDYLETHANOLAMINE AB (IGG), PHOSPHATIDYLETHANOLAMINE AB (IGM), PHOSPHATIDYLSERINE AB (IGA), PHOSPHATIDYLSERINE AB (IGG), PHOSPHATIDYLSERINE AB (IGM), Prothrombin Time (PT), Prothrombin Time (PT) INR, RA Latex Turbid, Reptilase Clotting Time, Rheumatoid factor, TGF-b1, Thrombin time, Transforming Growth Factor beta, Plasma, Tryptase, VEGF, Plasma