Rheumatoid Factor (IgA)
Test Summary
In conjunction with clinical findings and other laboratory tests, the presence of rheumatoid factor (RF) can be used to aid in the diagnosis of rheumatoid arthritis.
Aliases
- N/A
Specimen Collection
Special Instructions
N/A
Preferred Specimen
1 mL serum collected in a red-top tube (no gel)
Minimum Volume
0.3 mL
Instructions
N/A
Patient Preparation
Overnight fasting is preferred
Storage
N/A
Transport Temperature
Refrigerated (cold packs)
Specimen Stability
- Room temperature: 48 hours
- Refrigerated: 8 days
- Frozen: 28 days
Limitations
N/A
Other Acceptable Specimens
N/A
Unacceptable Specimens
Gross hemolysis • Gross lipemia • Grossly icteric • Heat treated samples • Serum separator tube (SST®)
Order Code
RFIGA
EPIC (Premier) Code
LAB5874
Includes
N/A
CPT Code
- 83520
Billing Code
- 700000
CPT Statement
Methodology
Immunoassay (IA)
FDA Status
FDA Approved
Physician Attestation of Informed Consent
N/A
Testing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly VA, 20153
14225 Newbrook Drive
Chantilly VA, 20153
Reference Range
| ≤6 U | Negative |
| >6 U | Positive |
Setup Schedule / Expected Turnaround Time
Tuesday, Saturday; Report available: 1 - 4 days
Specimen Collection
Special Instructions
N/A
Preferred Specimen
1 mL serum collected in a red-top tube (no gel)
Minimum Volume
0.3 mL
Instructions
N/A
Patient Preparation
Overnight fasting is preferred
Storage
N/A
Transport Temperature
Refrigerated (cold packs)
Specimen Stability
- Room temperature: 48 hours
- Refrigerated: 8 days
- Frozen: 28 days
Limitations
N/A
Other Acceptable Specimens
N/A
Unacceptable Specimens
Gross hemolysis • Gross lipemia • Grossly icteric • Heat treated samples • Serum separator tube (SST®)
Result Information
Methodology
Immunoassay (IA)
Testing Laboratory
N/A
Reference Range
| ≤6 U | Negative |
| >6 U | Positive |
Setup Schedule / Expected Turnaround Time
Tuesday, Saturday; Report available: 1 - 4 days