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HelpTest Code RA Rheumatoid Factor, Quantitative, Serum
Additional Codes
LAB206
Performing Laboratory
Central Peninsula Hospital
Collection Method
Venipuncture
Container
Gold Top SST
Specimen Type
Preferred
- Serum- Gold Top SST or Red Top
Acceptable
- Plasma- Light Green Top (Lithium heparin)
Minimum Volume
0.5ml
Specimen Stability
| Ambient | 1 day |
| Refrigerated (4°C to 8°C) | 8 days |
| Frozen(-40°C to 0°C) | 3 months |
Reference or Target Ranges
<14 IU/ml
Reportable Units
IU/ml
Critical Value
Not defined for this assay
Reasons for Rejection
| Hemolysis Threshold | 300 mg/dL |
| Icterus Threshold | 40 mg/dL |
| Lipemia Threshold | 2000 mg/dL |
| Other | QNS, contaminated, improperly labeled, improper specimen type |
Performance Information
| Days and Time Performed | 24/7 |
| Expected Turn Around Time |
Stat: 1 hour Routine: 4 hours |
| Stat Availability | Yes |
| Performing Bench | CPH Chemistry |
| Methodology/Method Description | Roche Cobas |
CPT Codes
86431
Last review/edit date
2025