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Test Code 4308 Rheumatoid Factor Panel (IgG, IgM and IgA)

Specimen Containers and Fixatives

Plain Red Top Tube

Specimen Required

NorthShore Lab Services: draw 4.5 mL (2.3 min) blood, centrifuge and submit 1.8 mL (0.9 min) refrigerated serum.

Hospital setting: submit 4.5 mL (2.3 min) blood.

Day(s) and Time(s) Performed

Monday – Friday, 5 days

Reference Values

RF IgG: ≤6

RF IgM: ≤6

RF IgA: ≤6

Method Name

EIA

CPT Code Information

83520 × 3