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HelpTest Code PHENY Phenytoin, Total, Plasma or Serum
Additional Codes
LAB31
Collection Method
Venous collection
Minimum Volume
0.5ml
Container
Lt Green / Plasma Separator / Lithium Heparin
Acceptable Specimens
Serum:
- Gold Top SST
- Red Top
Plasma:
- Light Geen Top (lithium heparin)
Reference or Target Ranges
10-20 µg/mL
Reportable Units
µg/mL
Critical Value
≥ 30 µg/mL
Reasons for Rejection
| Hemolysis Threshold | 1000 mg/dL |
| Icterus Threshold | 50 mg/dL |
| Lipemia Threshold | 800 mL |
| Other | QNS, contaminated, improperly Labeled, improper specimen type |
Specimen Stability
| Ambient | 4 days |
| Refrigerated (4°C to 8°C) | 4 days |
| Frozen(-40°C to 0°C) | 2 months |
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
80186
Last review/edit date
March 2024