WARFARIN SERUM

General Information

HLAB/HOL Code: WARF
UPHSM LIS Test #: 023904
Schedule:
Testing Time: 8-12 Days
Testing Lab: NMS Labs

Specimen Info
Only 1 specimen type required, unless otherwise specified

Volume: 3.0 mL
Temperature: Refrigerated
Tube Type: Plasma (EDTA)
Collection Info:
Container/Tube: EDTA (lavender top) or Pink top
Draw blood in EDTA (lavender top) or Pink top tube(s) (Plasma gel tube is not acceptable.) Spin down and send 1 mL of plasma refrigerate in preservative-free plastic vial.

Specimen Acceptability

REJECT DUE TO:
Hemolysis: NA
Lipemia: NA
Icterus: NA
Other: Polymer gel separation tube (SST or PST)

Methods

High Performance Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)

Clinical Utilities

Monitoring patients whose prothrombin time is inconsistent with the prescribed warfarin dose, particularly when failure to comply or surreptitious drug use is suspected.
Note: This test is not useful for evaluation of the patient with prolonged bleeding time suspected of exposure to rat poisons.

CPT Codes

80375

* 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.