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HelpPhenytoin Level Total
eD-H Order Code
LAB31
Specimen Collection Information
| Specimen | Minimum Test Volume | Container | Special Handling |
|---|---|---|---|
| Blood | 0.1 ML |
Specimen Transport Temperature
Refrigerated
Reference Ranges / Critical Values
| Assay | Gender | Age Range | Normal Range | Critical Values | Units |
|---|---|---|---|---|---|
| Phenytoin Total | All | 0 Minutes – 150 Years | 10.0 -20.0 | >25.0 | mg/L |
Specimen Stability
Interpretive Data
| Assay Display | Interpretive Data |
|---|---|
| Phenytoin Total | Patients with renal dysfunction (e.g. creatinine clearance < 30 mL/min) may show falsely elevated results due to accumulation of metabolites in renal failure. |
Day(s) Performed
Monday through Sunday; continuously
CPT(s)
80185
Performing Lab Section
Chemistry