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FALPX-M
ALPRAZOLAM, SERUM

Test Code FALPX-M 
Test ALPRAZOLAM, SERUM 
Methodology Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS) 
Specimen Draw blood in plain, red-top tube(s). (SERUM GEL TUBE IS NOT ACCEPTABLE.) Spin down and send 2.0 mL (minimum 1.0 mL) of serum refrigerated.
1. Indicate serum on request form.
2. Label specimen appropriatly (serum)
3. Trough levels are most reproducible

Draw blood in a green-top (sodium heparin) tube(s). (PLASMA GEL TUBE IS NOT ACCEPTABLE.) Spin down and send 2.0 mL of sodium
1. Indicate plasma on request form.
2. Label specimen appropriately (plasma).
3. Trough levels are most reproducible. 

Reference Values Therapeutic range: 5 - 25 ng/mL
Some patients respond well to levels of 25 - 55 ng/mL. 
Analytic Time 1 Day 
Day(s) Test Set Up Monday through Friday, Sunday 
CPT Code(s) 80346  
G0480 or  G0481 or G0482 or G0483, Drug test(s), definitive (Government payers, if appropriate), if indicated