83140: Diazepam and nordiazepam

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Alias Names: Valium
Methodology: Gas Chromatography (GC)
Edit Date: 10/13/2009
Performed: Daily
Released: 24-48 hours after setup at PeaceHealth Laboratories’ reference lab.
CPT Code: 80154-90 X2
Specimen Collection Details
Collection: One 5 mL red top tube. Do not use a serum separator tube (SST). Also acceptable: One 4 mL green top tube (heparin), 4 mL lavender top tube (EDTA), or 4 mL grey top tube (sodium fluoride/potassium oxalate).
Handling: Centrifuge and separate serum or plasma into a plastic vial.
Stability: 7 days ambient, 7 days refrigerated, or 2 months frozen.
Standard Volume: 1 mL serum or plasma
Minimum Volume: 0.5 mL serum or plasma
Transport: Refrigerated.

Reference Range:
Diazepam 0.2-1.0 µg/mL – Based on normal dosage amounts
Nordiazepam 0.06-1.80 µg/mL – Based on normal dosage amounts
Toxic: > 2.50 µg/mL

PeaceHealth Laboratories