Test Code RF Rheumatoid Factor, Serum
Additional Codes
Compendium Code (Iatric): L700.7901
Performing Laboratory
St. Lukes Hospital Laboratory
Methodology
Latex-enhanced immunoturbidimetric assay
Specimen Requirements
Separated specimens may be stored for up to 7 days at 2 - 8°C.
Draw blood in a serum gel tube(s). Spin down and send 1 mL of serum refrigerated.
Unspun specimens must be transported at ambient temperature and arrive to the laboratory within one hour of draw.
Reference Values
<15 IU/mL
Day(s) Test Set Up
Monday through Sunday
Test Classification and CPT Coding
CPT: 86431
LOINC: 11572-5