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Mayo Clinic Laboratories

Test Code RA Rheumatoid Factor, Serum

Methodology

Latex Particle Agglutination

Performing Laboratory

Aspen Valley Hospital

Physician Office Specimen Requirements

Container/Tube:  Gold-top serum gel tube(s) or orange-top tube(s) - Plasma is not acceptable.

Specimen:  1 mL (minimum volume:  0.5 mL) of serum
Transport Temperature:  Refrigerate

Collection Instructions:  Allow specimen to clot for approximately 10 minutes and spin down. If drawing gold-top serum gel tube, send entire tube to laboratory. If drawing orange-top tube, remove serum and place in separate plastic vial. If there is a delay in transport of >5 days, send specimen frozen.

Reference Values

Negative

Day(s) Test Set Up

Monday, Wednesday, Friday

Test Classification and CPT Coding

86430