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DIAZP / 007989L
DIAZEPAM AND NORDIAZEPAM, SERUM

Test Code DIAZP / 007989L 
Test DIAZEPAM AND NORDIAZEPAM, SERUM 
Methodology Liquid chromatography/tandem mass spectrometry (LC/MS-MS) 
Description Includes diazepam and nordiazepam

Useful in the management of diazepam therapy 

Specimen Draw blood in a plain red-top tube (DO NOT USE SERUM GEL TUBE). Spin down and send 1.0 mL (minimum volume: 0.4 mL) of serum refrigerated in a plastic, screw-capped vial.

NOTE: Collect peak level for oral medication 1 hour post dose. Collect peak level for IV medication 15 minutes post dose. 

Reference Values Diazepam + Nordiazepam: 0.2 - 2.5 g/mL
Potentially toxic: > 5.0 g/mL 
Analytic Time 1 Day 
Day(s) Test Set Up Tuesday through Friday 
CPT Code(s) 80346  
G0480 or  G0481 or G0482 or G0483, Drug test(s), definitive (Government payers, if appropriate), if indicated