Rheumatoid Factor, Quantative

Message

Performing Lab: Central Lab

Test Code

3025

Alias/See Also

Sunquest: RFQ

CPT Codes
86431

Preferred Specimen

0.1 mL Serum (gold-top) tube

Minimum Volume

53 uL

Transport Temperature

Refrigerated

Specimen Stability

Room Temperature: 24 hours
Refrigerated: 72 hours
Frozen: 30 days

Methodology
Immunoturbidimetric

Setup Schedule

Monday - Friday

Report Available

Same Day

Reference Range

0 - 30 IU/mL

Clinical Significance

Rheumatoid factor (RF) consists of autoantibodies of immunoglobulin isotypes IgM, IgA, IgG, and IgE. The function of RF remains unclear, but it may play a role in the regulation of humoral and cellular immunity and protection against invading microorganisms. Most patients with rheumatoid arthritis and Sjögren’s syndrome have elevated levels of RF. RF may also be elevated in scleroderma, dermatomyositis, Waldenström’s disease, sarcoidosis, and systemic lupus erythematosus. There are also instances of elevated RF without apparent disease or definable clinical disorders.

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.