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Heparin Anti Xa Assay

Test Code
HXA


Alias/See Also
Lovenox (Enoxaparin), Low Molecular Weight Heparin Assay, Unfractionated Heparin Assay


Preferred Specimen
1 mL platelet poor sodium citrate plasma


Minimum Volume
1 mL


Transport Container
Plastic vial


Transport Temperature
Frozen


Specimen Stability
Frozen 14 days


Report Available
2-3 days


Reference Range
See report for normal ranges.


Clinical Significance
Heparins are sulphated glycosaminoglycans that inactivate thrombin, factor Xa, and several other coagulation factors; act by enhancing activity of the plasma coagulation inhibitor, antithrombin III (AT III); prolong the activated partial thromboplastin time (APTT); of low molecular weight heparin have minimal effect on the APTT, and require an alternative method, such as the anti-Xa assay, to monitor 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.