Low Molecular Weight Heparin Anti Xa

Test Code

LMWH ANTI-XA

Alias/See Also

Anti-Xa
Anti Heparin(LMWH)
Hematology

Preferred Specimen

Light Blue Top Tube – 3.2% sodium citrate

Instructions

Bring to Laboratory Immediately.

Transport Temperature

Room Temperature

Specimen Stability

24 hours at room temperature or up to 1 week frozen at −70°C

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

Under Drawn or overdrawn, and clotted specimens are not acceptable for testing.

Methodology
One stage, Chromogenic Assay

Setup Schedule

Daily

Report Available

1 hour

Reference Range

Low Molecular Weight-Therapeutic (Twice Daily Dosage): 0.4 - 1.1 IU/mL
(Once Daily Dosage): 1.0 - 2.0 IU/mL

Clinical Significance

Test for Monitoring Heparin Therapy

Performing Laboratory
Test performed in BACL Hematology Labs
Contact Nolan Raymond - West Roxbury 857-203-5980

Last Updated: May 19, 2025

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.