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Specimen Collection Manual and Test Catalog

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RIVAROXABAN

Geisinger Epic Procedure Code:  LAB3016    Geisinger Epic ID:  46754

SPECIMEN COLLECTION
Specimen type: 

Plasma


Preferred collection container: 
Specimen required: 

1 mL plasma collected in a 3.2% sodium citrate (light blue-top)


Special notes: 

Collect samples 2-4 hours post dose (peak)



SPECIMEN PROCESSING
Processing instructions: 

Centrifuge and aliquot.


Transport temperature: 

Frozen.


Specimen stability: 

Frozen: 28 days.


Rejection criteria: 

Room temperature and refrigerated samples not acceptable. Hemolysis.



TEST DETAILS
CPT code(s):  80299
Note: The billing party has sole responsibility for CPT coding.  Any questions regarding coding should be directed to the payer being billed.
The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only.

Methodology: 
Chromogenic
Synonyms: 

Quest test code 90981, anti Xa, anti-Xa, RIVAR


Clinical significance: 

Rivaroxaban is an oral factor Xa inhibitor that is indicated to reduce the risk of stroke and systemic embolism in patients with nonvalvular atrial fibrillation. It is also indicated for the treatment, prophylaxis, or the reduction in the risk of reoccurrence of deep vein thrombosis (DVT) or pulmonary embolism (PE). Rivaroxaban does not need to be monitored routinely, however, exceptions may include determination of failure of therapy vs. poor compliance, or potential dose adjustment required for renal or hepatic dysfunction.


Review Date:  06/02/2025

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