Test ID: RF IgA

Used to evaluate patients at risk for rheumatoid arthritis (RA) or those presenting with features of inflammatory arthritis. Rheumatoid factor (RF) IgM antibody may aid in diagnosis and offers higher sensitivity. The Rheumatoid Arthritis Panel is the preferred test for evaluating suspected RA or undifferentiated inflammatory arthritis, whereas the RF Panel is more appropriate for prognostic purposes

• EPIC Code: LAB5229
• Exsera Order Code: RF IgA
• CPT Code: 83516 (IgA)

Specimen Type: Serum

Collection Tube: Serum separator tube (SST) or red top

Collection Instructions: Separate serum from cells ASAP or within 2 hours of collection. Then transfer available serum to a standard transport tube.

Volume Required: 1 mL with a minimum of 500 mcL  

Storage/Transport Temperature: Refrigerated/Frozen

Stability: Ambient (up to 8 Hours), refrigerated (up to 2 weeks/14days), frozen (up to 30 days) and avoid freeze/thaw cycles with no more than 3 in total

Unacceptable Conditions: Contaminated, heat-inactivated, containing clots fibrin or gross red blood cells, or severely lipemic hemolyzed or icteric samples

Normal Human: </=6

This test has been cleared by the US Food and Drug Administration and is used per manufacturer's instructions and per Exsera's SOPs. Performance characteristics were verified by Exsera in a manner consistent with CAP/CLIA requirements.

ELISA or EIA

7 Business Days

Days Performed: M-F

RF IgA, Rheumatoid factor IgA antibodies

RF IgM & RF IgA, Epic Orderable as RF IgM & RF IgA Only