Prothrombin Time with INR


Screening test for abnormalities of coagulation factors that are involved in the extrinsic pathway. Also used to monitor effects of Warfarin therapy and to study patients with hereditary and acquired clotting disorders.

Prothrombin Time with INR


Average competitors price


Pricing based on average direct to consumer pricing.
  • Fasting Required: NO
  • Preferred Specimen: Plasma
  • Reference Range(s):
    PT 9.0-11.5 sec  
    Reference range 0.9-1.1
    Moderate-intensity Warfarin therapy 2.0-3.0
    Higher-intensity Warfarin therapy 3.0-4.0
  • Limitations: Expected impact by therapeutic levels (potential interference depends upon drug concentration): Warfarin: prolonged; Heparin (UFH or LMWH): little to no effect (reagent contains a heparin neutralizer); Dabigatran or Argatroban (Thrombin Inhibitors): normal to prolonged; Rivaroxaban or Apixaban (Factor Xa Inhibitors): prolonged.
  • Turnaround Time: 1 Day
  • Test Code: 8847