Methodology
Ultrafiltration; Immunoassay (IA)
Synonyms
Dilantin
Specimen Type
Serum
Performing Lab
Quest Diagnostics Chantilly
Epic ID
LAB01522
Lab Test Days
Monday-Saturday
Standard TAT
1 Day
Collection Information
Specimen Required
2-5 mL Blood
Collection Instructions
Collect as a trough just prior to next dose. For patients receiving fosphenytoin therapy, collect as peak (at least 2 hours after IV infusion or at least 4 hours after IM injection).
Processing Information - Lab Use Only
Transport Temperature
Refrigerate-OK/Frozen-OK
Specimen Stability
Room Temp=4 Days; Refrigerated=7 Days; Frozen=30 Days
Rejection Criteria
Serum separator tubes (SST); Plasma
Test Volume Required
2.5 mL Serum
Minimum Test Volume
1 mL Serum
CPT Codes
80186
Revised
02-23-20
Initials
SL