View information on our visitor policy. >>

Information about coming with a patient for their appointment, test or surgery. >>

Text size: a a a

Laboratory Medicine

Test catalogue

Anti-Xa Activity (Rivaroxaban)

Test Name

Anti-Xa Activity (Rivaroxaban, Xarelto)

Blue top Specimen Type / Requirements

Container Type = Blue (Sodium Citrate)

Minimum Volume = Full draw

9:1 Ratio (9 parts blood to 1 part anticoagulant)

Specimen Handling

Collection Instructions: Must indicate anticoagulant status to avoid delay.

Write your initials, date and time of collection on the collection label.

Transportation: Send sample at room temperature to the Core lab as soon as possible.

Sample Rejection Criteria: Clotted sample, grossly hemolyzed samples, Unlabeled or samples with insufficient quantity will be rejected.

Required Documentation

Turnaround Time (TAT)

STAT: 4 hrs

Routine: 1 day

Test Utilization

Reference Value

See Interpretive Comment

Test Code



Chromogenic Assay

Testing Location

SMH-Special Coagulation

Other information

Last Updated: June 06, 2019