Heparin Anti-Xa, Unfractionated
0030143
Ordering Recommendation
 
Mnemonic
HA UN
Methodology
Chromogenic Assay
Performed
Sun-Sat
Reported
Within 24 hours  
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
Specimen Required
Patient Preparation
  
Collect
Lt. blue (sodium citrate). Refer to Specimen Handling at aruplab.com for hemostasis/thrombosis specimen handling guidelines.  
Specimen Preparation
Centrifuge specimen within one hour of collection. Transport 2 mL platelet-poor plasma. (Min: 1 mL)  
Storage/Transport Temperature
Frozen.  
Unacceptable Conditions
Serum. EDTA, oxalate, heparin, or plasma separator tubes. Specimens refrigerated more than eight hours. Hemolyzed specimens.  
Remarks
Record heparin type on test request form.  This test cannot be used for Rivaroxaban (Xarelto).  
Stability
After separation from cells: Ambient: 4 hours; Refrigerated: 8 hours; Frozen: 1 month  
Reference Interval
0.35-0.70 U/mL  
Interpretive Data
 
Note
 
CPT Code(s)
85520
Components
Component Test Code*Component Chart NameLOINC
0030143Heparin Anti-Xa Unfractionated3274-8
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • Anti-10a
  • Anti-Xa
  • Heparin Anti-Xa Assay
  • Heparin Anti-Xa Assay, Plasma
  • Unfractionated Heparin Assay