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| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
Rheumatoid Factor
Test CodeRFQ
Quest Code
4418
CPT Codes
86431
Preferred Specimen
1 mL serum
Minimum Volume
0.5 mL
Transport Container
Serum separator tube (SST)
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 5 days
Refrigerated: 7 days
Frozen: 90 days
Refrigerated: 7 days
Frozen: 90 days
Methodology
Immunoturbidimetric
Setup Schedule
Days Monday-friday
Report Available
2 days
Reference Range
<14 IU/mL
Clinical Significance
Elevated RF is found in collagen vascular diseases such as SLE, rheumatoid arthritis, scleroderma, Sjogren's syndrome, and in other conditions such as leprosy, tuberculosis, syphilis, malignancy, thyroid disease and in a significant percentage of otherwise normal elderly patients.
Performing Laboratory
| Quest Diagnostics LLC |
| 200 Forest Street, 3rd Floor, Suite B |
| Marlborough, MA 01752-3023 |
