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Test Name

Rheumatoid Factor

CPT Code(s)

86431

Methodology

Immunoturbidimetric

Reference Range(s)

<14 IU/mL

Clinical Significance

Elevated RF is found in collagen vascular diseases such as SLE, rheumatoid arthritis, scleroderma, Sjogren'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

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Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.

The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.

* The tests listed by specialist are a select group of tests offered. For a complete list of Quest Diagnostics tests, please refer to our Directory of Services.

4418
4418
4418
4418
4418
115725R
115725R
4418
4418
115725R
4418X
115725R
441800
4418 NTC
441800 RF
RHEU FAC
RHEU FACTOR
4418
1540
4418
115725P
4418
4418X
4418
4418
3752
4418X
4325
4418
4418
Rheumatoid Factor
4418