0050465
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Rheumatoid Factor

RA
Example Reports
Abnormal
Normal

Ordering Recommendation

Aids in the workup of suspected rheumatoid arthritis or undifferentiated inflammatory arthritides. Consider ordering this test in conjunction with Cyclic Citrullinated Peptide Antibody, IgG and IgA (3016632) to increase specificity and sensitivity. The preferred test is Rheumatoid Arthritis Panel (3016634).

New York DOH Approval Status

This test is New York state approved.

Specimen Required

Patient Preparation

Fasting specimen preferred.

Collect

Serum separator tube or plasma separator tube. Also acceptable: Green (lithium heparin), lavender or pink (K2EDTA).

Specimen Preparation

Allow specimen to clot completely at room temperature. Transfer 0.5 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.5 mL)

Storage/Transport Temperature

Refrigerated.

Unacceptable Conditions

Body Fluid (refer to Rheumatoid Factor, Body Fluid, ARUP test code 2003347). Hemolyzed specimens.

Remarks
Stability

After separation from cells: Ambient: 24 hours; Refrigerated: 8 days; Frozen: 3 months (should not be thawed more than once)

Methodology

Quantitative Immunoturbidimetry

Performed

Sun-Sat

Reported

Within 24 hours

Reference Interval

0-14 IU/mL

Interpretive Data



Compliance Category

FDA

Note

Hotline History

N/A

CPT Codes

86431

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Components

Component Test Code* Component Chart Name LOINC
0050465 Rheumatoid Factor 11572-5
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.

Aliases

  • RA
  • RF
  • Rheumatoid Arthritis Factor
Rheumatoid Factor