Days Set Up
Monday - Sunday
Analytic Time

8 - 10 days

MiChart Code
Warfarin, Plasma
Soft Order Code
FWARP

Test Updated:

Synonyms

Coumadin
Panwarfarin
WRF
WARFARIN (COUMADIN) PLASMA

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Find a Requisition

All specimens should be accompanied by a requisition.

Submitting Specimens

Learn about how to properly label and where to ship specimens.

Order Kits and Supplies

MLabs provides all the supplies necessary for the collection of specimens.

Test FAQ

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Test Overview

Test Methodology

High-Pressure Liquid Chromatography/ Tandem Mass Spec (HPLC/MS/MS)

Test Usage

Monitoring patients whose prothrombin time is inconsistent with the prescribed Warfarin dose.

Reference Range

Therapeutic: 2.0 mcg/mL

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Specimen Requirements

Offsite Collection Instructions

Collect specimen in a EDTA lav top tube. Centrifuge, aliquot plasma into a plastic vial and refrigerate (preferred) or freeze.

Normal Volume
3 mL plasma
Minimum Volume
1.1 mL plasma

Billing Information

CPT Code
80375
Pro Fee Code
 
LOINC
 

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Our High Standard

Quality that sets us apart

As the reference laboratory division of Michigan Medicine's Department of Pathology, MLabs shares the institution's commitment to applying established quality principles to clinical laboratory testing. Like other large organizations in complex, consequential fields, we rely on an established approach to monitor quality throughout the testing process.