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Test Directory

Test Directory Warfarin

Warfarin

Test Summary

The dosage of warfarin is best adjusted based on the International Normalized Ratio (INR) for prothrombin time.

Aliases

NMS code 4800SP

Specimen Collection

Special Instructions

N/A

Preferred Specimen

1 mL serum collected in a red top tube

Minimum Volume

0.2 mL

Instructions

Promptly centrifuge and separate Serum or Plasma into a plastic screw capped vial using approved guidelines.

Patient Preparation

N/A

Storage

Plastic screw-cap vial

Transport Temperature

Refrigerated

Specimen Stability

Room temperature: 30 days
Refrigerated: 30 days
Frozen: 15 months

Limitations

N/A

Other Acceptable Specimens

Plasma collected in a lavender top tube (EDTA) or pink top tube (EDTA)

Unacceptable Specimens

Polymer gel separation tube (SST or PST)

Order Code

WARFAR

EPIC (Premier) Code

LAB779

Includes

N/A

CPT Code

80299

Billing Code

670801

CPT Statement

Methodology

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

FDA Status

This test was developed and its performance characteristics have been determined by NMS Labs. It has not been cleared or approved by the U.S. Food and Drug Administration.

Physician Attestation of Informed Consent

N/A

Testing Laboratory

National Medical Services
200 Welsh Rd
Horsham PA, 19044

Department

Reference Testing

Reference Range

See Laboratory Report

Setup Schedule / Expected Turnaround Time

Report available: 7 days