Prothrombin Time with INR

Test Code

Preferred Specimen
Sodium Citrate-Light Blue

"The ratio of blood to anticoagulant is critical. Blue top must be completely full to fill line for a 9:1 ratio.
Testing Frequency: 24/7"

Transport Container
BLUE, Na Citrate

Specimen Stability
Stability: 24 hours room temperature

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Patient plasma should be tested within 24 hours (centrifuged or
uncentrifuged) if stored in an unopened tube at Room Temp.
Refrigerated samples unacceptable.


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.