Test Code: 4418
CPT Code(s): 86431
Methodology: Immunoturbidimetry
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
CLIA