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Test Code 4087 Rheumatoid Factor

Specimen Containers and Fixatives

NorthShore Lab Services: Gold Top Tube (SST)

Hospital setting: Light Green Top Tube with lithium heparin (PST)


For add-on testing, refer to link below for acceptable tube types:

Acceptable Tube Types for Chemistry Tests

Specimen Required

NorthShore Lab Services: draw 0.8 mL (0.5 min) blood, centrifuge and submit 0.3 mL (0.2 min) refrigerated serum

Hospital setting: submit 0.8 mL (0.5 min) blood


For sample stability, refer to the link below:

Sample Stability Chart for Chemistry Analytes

Day(s) and Time(s) Performed


Daily, 24 hours

Reference Values

<14 IU/mL

Method Name


CPT Code Information


LOINC Code Information