TEST CHANGE
TEST OBSOLETE
Warfarin, Serum
Order Code: WRF
CPT Code: 80299
Referral Laboratory: Mayo Laboratories
REPLACEMENT TEST
Warfarin, Plasma
Order Code: FWARP
CPT Code: 80375
Referral Laboratory: Mayo Laboratories
Effective August 15, 2020, MLabs will be replacing the Warfarin, Serum (FSCMS) test and replacing if with Warfarin, Plasma (FWARP) test per Mayo Medical Laboratories.
Collection Instructions: Collect 3mL of whole blood in an EDTA lavender top vacutainer or pink top vacutainer. Centrifuge and aliquot the plasma into a plastic vial. Ship the specimen refrigerated to MLabs.
Specimen Stability
Specimen Type |
Temperature |
Time |
Plasma |
Refrigerated (preferred) |
14 Days |
|
Ambient |
14 Days |
|
Frozen |
90 Days |
Methodology: High Performance Liquid Chromatography/Tandem Mass Spectrometry (LC-MS/MS)
Test Analysis: Mon- Sun 8 days
Reference Range: 0.2 mcg/mL
The reported value may vary based on dilution or weight of the specimen