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Test Code LAB206 Rheumatoid Factor, Quantitative

Test Name Alias

Rheumatoid Antibody Level | RA Quantitative | 8522

Collection Instructions

Specimen Collection: Blood

Container(s): Gold Top (Serum Separator-SST Gel)

Preferred Volume to Collect: 5.0 mL

Minimum Volume to Collect: 2.0 mL

Neonate Volume to Collect: 2.0 mL

Capillary collect ok: Yes

Microtainer acceptable: Yes

Collection Instructions:

  • Gently invert gold tube(s) 8-10 times to mix clot activator with blood.
  • Specimen should be processed within 2 hours – See Processing Instructions.

Processing Instructions (Laboratory, Outpatient or Off-site collection)

Processed Specimen: Serum

Centrifuge/Spin: Yes

Aliquot: No

Processing Instructions:

  • Allow blood to clot for 30 minutes in a vertical position and centrifuge within 2 hours.

Transport Temperature: Refrigerate

Rejection Criteria

Specimen not centrifuged within 2 hours

Specimen Stability

SHRL-Spectrum Health Regional Laboratory, Grand Rapids

Ambient: 8 hours

Refrigerate: 72 hours

Frozen: aliquot serum for longer storage

Laboratory Retention: 7 days

Test Frequency

SHRL - Available Monday through Friday, usual TAT 1-3 days.

Reference Range

SHRL: Interpretive ranges:

Negative :  <3.5 IU/ml

Equivocal:  3.5-5.0 IU/ml

Positive:   >5.0  IU/ml

Performing Department


Performing Department Laboratory Location

Spectrum Health Regional Laboratory, Grand Rapids, MI


EliA Sytem Fluorescence Enzyme Immunoassay (FEIA)



CDM Code


Epic Test ID


Interface Order Alias


Mayo Access Code



Rheumatoid Factor: 6928-6

Reviewed Date