Laboratory Services

Rheumatoid Factor

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Updated Test Information:

Test Description
Rheumatoid Factor
Synonym(s)

RF

Test ID
RF
Specimen Type

Serum

Specimen Requirements

SST

Alternate Specimen Type

Red, Li or Na-heparin, EDTA (Na2 or K2)

Specimen Collection / Processing Instructions

Centrifuge within 2 hours of collection

Minimum Sample Volume

1 mL

Pediatric Min. Volume (if applicable)

500 uL

Stability

1 day at 20-25°C
8 days at 4-8°C
3 months at -20°C

Methodology

Immunoturbidimetric assay

Estimated TAT

0-2 days

Testing Schedule

Monday-Saturday

CPT Code(s)

86431

Reference Range

<14 IU/mL

Performing Lab

Incyte Diagnostics

LOINC Code(s)

11572-5