A B C D E F G H I J K L M N O P Q R S T U V W X Y Z #

Protime or Prothrombin Time (PT), Plasma

Test Code
PTT


Alias/See Also
PT


CPT Codes
85610

Preferred Specimen
Testing should be performed within 24 hours of draw. Draw blood in a blue-top (sodium citrate) tube. Spin specimen down and send 2 mL of plasma in plastic vial. If testing is delayed plasma should be placed in a tightly-sealing tube and may be stored frozen for up to 2 weeks.


Transport Temperature
Frozen


Methodology
Viscosity Based Detection

Setup Schedule
Monday through Sunday


Reference Range
PT: 9.0-12.7 seconds

Critical value: greater than normal range on pre-Op patients not receiving anticoagulant

INR >2.0 on patients not receiving anticoagulant therapy

INR >4.0 on patients receiving anticoagulant therapy



Performed By
North Mississippi Medical Center Pathology Department

Performing Laboratory
NMMC Pathology Department



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.