Rheumatoid Factor

Test Code

4418

Alias/See Also

1230101414 | LAB206: Rheumatoid Factor Quantitative | QUEST EAP: 4418 | RA|RF

CPT Codes
86431

Preferred Specimen

1 mL serum

Minimum Volume

0.5 mL

Transport Temperature

Room temperature

Specimen Stability

Room temperature: 5 days
Refrigerated: 7 days
Frozen: 90 days

Methodology
Immunoturbidimetric

Setup Schedule

Set up: Mon-Fri; Report available: 1-3 days

Reference Range

<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.

Performing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153

Last Updated: April 21, 2023

The CPT Codes provided in this document 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 payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.