Warfarin (Coumadin)

Test ID: Z1737

CPT code: 80299
LOINC: 4098-0
Specimen Type: Red non gel
Frequency: Setup: Wed; analytic time 2 days
Instructions: 3.0mL serum from red NONGEL tube. Min 1.2 ml. Refrigerated
Text: Useful in Monitoring patients whose PT is inconsistent with the
prescribed warfarin dose, particularly when failure to comply or
surreptitious drug use is suspected.
Methodology: High-Performance Liquid Chromatography (HPLC)

Test Name


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