Phenytoin Level, Phenytoin Total, Dilantin Total

Message

Draw a sample within two to four hours after an intravenous loading dose and, at steady-state, collect a specimen representing the trough level just before the next scheduled dose.

Test Code

DILAN

Alias/See Also

Dilantin Level

CPT Codes
80185

Preferred Specimen

Light GREEN (PST)

Patient Preparation
Draw a sample within two to four hours after an intravenous loading dose and, at steady-state, collect a specimen representing the trough level just before the next scheduled dose.

Other Acceptable Specimens

Serum RED (Red), Gold (SST), Orange (OJ), or Tiger Top Serum
Plasma Purple (LAV)-EDTA; Green Lithium Heparin

Specimen Stability

Sample Stability:

Refrigerator Temperature: Store the serum or plasma refrigerated at 2-8°C. for up to one month.
Freezer Temperature: Store serum or plasma frozen (≤-20°C) for up to 3 months.

Methodology
Beckman AU

Setup Schedule

24x7

Report Available

24x7

Reference Range

Reference Range: 0-12 months: 8.0-15.0 ug/mL; Critical: >30.0 ug/mL
Reference Range: 12 month-Adult: 10.0-20.0 ug/mL; Critical: >30.0 ug/mL

Clinical Significance

Phenytoin is used in the treatment of primary or secondary generalized tonic-clonic seizures (whole brain seizures), simple partial (focal cortical seizures), or complex partial seizures (temporal lobe seizures), and epilepsy.

Performing Laboratory
CRMC Laboratory
CCMC Laboratory

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.