PHENYTOIN FREE AND TOTAL SERUM
General Information
HLAB/HOL Code: PTNTF
UPHSM LIS Test #: 026890
Schedule:
Testing Time: 2-5 Days
Testing Lab: Labcorp
UPHSM LIS Test #: 026890
Schedule:
Testing Time: 2-5 Days
Testing Lab: Labcorp
Specimen Info
Only 1 specimen type required, unless otherwise specified
Volume: 3.0(2.3) mL Serum or Plasma
Temperature: Ambient
Tube Type: Serum or Plasma
Collection Info:
Minimum Volume: 2.3 mL
Container: Red-top tube or green-top (heparin) tube. Do not use a gel-barrier tube. The use of gel-barrier tubes is not recommended due to slow absorption of the drug by the gel. Depending on the specimen volume and storage time, the decrease in drug level due to absorption may be clinically significant.
Collection: Transfer separated serum or plasma to a plastic transport tube. Collect specimen just prior to next dose. Serum or plasma must be separated from cells within 45 minutes of collection. Send serum or plasma in a plastic transport tube.
Temperature: Ambient
Tube Type: Serum or Plasma
Collection Info:
Minimum Volume: 2.3 mL
Container: Red-top tube or green-top (heparin) tube. Do not use a gel-barrier tube. The use of gel-barrier tubes is not recommended due to slow absorption of the drug by the gel. Depending on the specimen volume and storage time, the decrease in drug level due to absorption may be clinically significant.
Collection: Transfer separated serum or plasma to a plastic transport tube. Collect specimen just prior to next dose. Serum or plasma must be separated from cells within 45 minutes of collection. Send serum or plasma in a plastic transport tube.
Specimen Acceptability
Cause for Rejection:
Gel-barrier tube; hemolysis; lipemia
Gel-barrier tube; hemolysis; lipemia
Methods
Total: immunoassay; Free: ultrafiltrate assayed by immunoassay
Clinical Utilities
Evaluate toxicity; monitor therapeutic levels
CPT Codes
80185; 80186
* The CPT codes provided 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 payer being billed.
Reference Range
Interpretive report is provided
