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Prothrombin Time w/INR (PT/INR)

Test Code
PTINR


Preferred Specimen
Plasma, Full Tube Draw


Instructions
Indicate time of last Coumadin dose.


Transport Container
Light Blue top


Transport Temperature
Specimen stable for 24 hours if at room temp. or refrigerated, spun or unspun, and must remain capped.


Reference Range
See report for normal ranges. Critical Value: INR >6.0 sec (<1.4 if anticoag hx provided)


Clinical Significance
The PT/INR assay is intended to screen for abnormalities of the coagulation proteins involved in the extrinsic and common pathways. It is commonly used to monitor patients on oral anticoagulant (Coumadin) therapy.




The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.