Rheumatoid Factor Isotypes, IgG, IgA, and IgM by EIA (RDL)
Test Code: 520178
Performing Lab: LabCorp
CPT Code: 86431 003
Specimen Type
Serum
Specimen Container
Red-top tube or gel-barrier tube
Volume
4 mL
Minimum Volume
3 mL (NOTE: This volume does NOT allow for repeat testing).
Specimen Handling
Separate serum from cells within one hour of collection. Transfer to a plastic transport tube before shipping. To avoid delays in turnaround time when requesting multiple test on frozen samples, PLEASE SUBMIT SEPARATE FROZEN SPECIMENS FOR EACH TEST REQUESTED.
Unacceptable Conditions
Grossly hemolyzed; bacterial contamination; lipemic specimen; icteric specimen; non-serum specimen types
Temperature
Refrigerate
Methodology
Enzyme-linked immunosorbent assay (ELISA)
Stability
Room Temperature: 7 days
Refrigerated: 14 days
Frozen: 60 days
Refrigerated: 14 days
Frozen: 60 days
| Result Code | Result Name | LOINC |
|---|---|---|
| 520100 | RF, IgG by EIA (RDL) | 33314-6 |
| 520102 | RF, IgA by EIA (RDL) | 33313-8 |
| 520098 | RF, IgM by EIA (RDL) | 9338-5 |
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