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Activated Partial Thromboplastin Time (APTT)

Message
Day(s) Test Set Up: Monday through Sunday


Test Code
PTT


CPT Codes
85730

Instructions
Specimen must arrive within 4 hours of draw. Draw a full tube. Invert several times to mix blood. Avoid hemolysis


Transport Container
Light blue-top (3.2% sodium citrate) tube.


Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Clotted blood is not acceptable.


Methodology
Optical Density

Reference Range
Normal: due to lot to lot variation, call lab for current reference range


Clinical Significance
Useful for heparin monitoring and the discovery of coagulation abnormalities.



Last Updated: November 4, 2010


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.