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Test Code 420 Rheumatoid Factor, QL

Additional Codes


PowerChart: Not Available

MA Cerner: Rheumatoid Arthritis, QL

Specimen Requirement

1 mL serum is required.

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.

Useful For

Screening for rheumatoid arthritis


Testing is performed Monday through Sunday.

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

CPT Code Information

86430 Additional Diagnostic Immunology Testing: Rheumatoid factor; qualitative

LOINC Code Information

33910-1 Rheumatoid Factor [Presence] In Serum

Test Method

Qualitative Latex Agglutination; Sure-Vue

Reference Values


Testing Algorhithm

A quantitative test is referred to Mayo Medical Laboratory on all positive qualitative tests. See rheumatoid factor quantitative.