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HelpTest Code PTNF Phenytoin Dilantin Free
Alias
Free Dilantin
Collection Method
Venous Collection
Container
Serum Red no gel
Instructions/Special Handling
None
Preferred Specimen
Serum Red No Gel
Units
mcg/mL
Reference Ranges
Therapeutic range: 1.2 - 2.5 mcg/mL
Critical Values
>3.0 mcg/mL
Reasons for Rejection
| Hemolysis | N/A |
| Icterus | N/A |
| Lipemia | N/A |
| Other | QNS, Contaminated, Improperly labeled, Improper specimen type |
Specimen Stability
| Ambient (15-25°C) | 4 days (capped) |
| Refrigerated (2-8°C) | 4 days (capped) |
| Frozen (-20°C) | 2 months (capped) |
Performing Site
Mayo Medical Laboratory
Performance Information
| Days/Times Performed | Monday-Sunday |
| Expected Turn around Time | Same day |
| Methodology/Method Description | Roche Cobas - Kineteic interaction of microparticles |
CPT Code(s)
80186
Panel Components
N/A