A141

Test CODE NAME

A141

Phenytoin, Free and Total

Methodology: Quantitative Enzyme Multiplied Immunoassay Technique
Performed: Tue-Sat
Reported: 2-5 days
Specimen Required: Patient Preparation: Timing of specimen collection: Pre-dose (trough) draw - At steady state concentration. 
Collect: Plain Red - 2 ml serum.
Specimen Preparation: Separate serum from cells within 2 hours of collection. Transfer  serum to a Standard Transport Tube. 
Storage/Transport Temperature: Refrigerated. 
Unacceptable Conditions: Citrated plasma. Serum separator tubes (SST). Tubes that contain liquid anticoagulant. Stability: After separation from cells: Refrigerated: 4 days; Frozen: 1 month 
Note: This test is approved for NY .
Performing Lab 
ARUP Laboratory
CPT Code(s): 80185; 80186