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Test Code RASCR Rheumatoid Factor, QL LAB1195

Test Method

Qualitative Latex Agglutination; Sure-Vue


Testing is performed Monday through Sunday.

Typically completed within 4 hours after the specimen
arrives at the testing site.

Reference Values


Useful For

Screening for rheumatoid arthritis

Specimen Requirement

1 mL serum is required.

CPT Code Information

86430 Additional Diagnostic Immunology Testing: Rheumatoid
factor; qualitative

LOINC Code Information

33910-1 Rheumatoid Factor [Presence] In Serum

Additional Specimen Collection Information

Collect blood in a red-top or SST (serum gel tube).
Serum should be separated from contact with the cells within 2
hours of collection. Refrigerate the specimen if unable to assay
within 8 hours of collection. Samples with >2+ lipemia must be
cleared prior to analysis. Hemolysis is not acceptable.

Testing Algorhithm

A quantitative test is referred to St. Luke's Laboratory on
all positive qualitative tests. See rheumatoid factor