RF Test: What is the Normal Range for a Rheumatoid Factor Test?
RF Test: What is the Normal Range for a Rheumatoid Factor Test? The rheumatoid factor is an antibody present in the blood of many patients with rheumatoid arthritis. Doctors measure the …
Rheumatoid Factor: What It Is, Test Details & Normal Range
Jan 18, 2024 · Providers usually measure rheumatoid factor as a number that says how many units of RF are in each milliliter of your blood (U/mL). A normal, healthy amount of rheumatoid …
Rheumatoid factor: Ranges, tests, and treatment - Medical News Today
Aug 20, 2025 · Rheumatoid factor is an immune system protein. Its levels in the body can help doctors diagnose autoimmune conditions. Learn about tests and ranges here.
Rheumatoid factor - Mayo Clinic
Aug 26, 2023 · High levels of rheumatoid factor in the blood are most often related to autoimmune diseases, such as rheumatoid arthritis and Sjogren syndrome. But rheumatoid factor may be …
Rheumatoid Factor - Medscape
Oct 16, 2025 · Antibodies directed against the Fc fragment of immunoglobulin (Ig)G are called rheumatoid factors (RFs). They are heterogenous and usually composed of IgM. Because of …
Rheumatoid Factor (RF) Test - MedlinePlus
A negative (normal) result means that you have little or no rheumatoid factor in your blood. But that doesn't rule out rheumatoid arthritis or another health problem.
Rheumatoid Factor: Test, Meaning, Levels, Results - MedicineNet
The "normal" range (or negative test result) for rheumatoid factor is less than 14 IU/ml. Any result with values 14 IU/ml or above is considered abnormally high, elevated, or positive.
Rheumatoid Factor (RF) Test and What It Means - Verywell Health
Dec 20, 2025 · Rheumatoid factor is an autoantibody produced by the immune system in people with rheumatoid arthritis. High levels of RF in your blood indicate that you may have an …
Rheumatoid Factor Levels: Normal 60 & What It Means
Dec 11, 2025 · Normal rheumatoid factor levels fall below 20 IU/mL, while levels exceeding 60 IU/mL indicate significantly elevated RF that strongly suggests autoimmune disease.
What is a normal rheumatoid factor (RF) level? - droracle.ai
Oct 21, 2025 · A normal rheumatoid factor (RF) level is less than or equal to the upper limit of normal (ULN) for the laboratory and assay, which is typically considered to...