CPT Code(s)

86431

Methodology

Immunoturbidimetry

Reference Range(s)

<14 IU/mL

Clinical Significance

Elevated RF is found in collagen vascular diseases such as SLE, rheumatoid arthritis, scleroderma, Sjögren's Syndrome, and in other conditions such as leprosy, tuberculosis, syphilis, malignancy, thyroid disease and in a significant percentage of otherwise normal elderly patients.

Alternative Name(s)

RF