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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



Rheumatoid Factor: 6928-6

Mayo Access Code


Reviewed Date