Chlordiazepoxide (Librium)

Test Code

LIB

Alias/See Also

Chlordiazepoxide and Metabolites

Quest Code
91123

CPT Codes
80346

Includes

Chlordiazepoxide
Norchlordiazepoxide
Nordiazepam

Preferred Specimen

2 mL serum collected in a no additive (red-top) tube, transferred to a plastic screw-cap vial

Minimum Volume

1 mL

Patient Preparation
Collect at trough concentration, i.e. just before the administration of the next dose.

Instructions

Refrigerate within 1 hour.

Transport Temperature

Refrigerated

Specimen Stability

Room temperature: unacceptable
Refrigerated: 5 days
Frozen: 14 days

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

Collection in serum separator tube (SST)

Methodology
Liquid Chromatography / Tandem Mass Spectrometry (LC/MS/MS)

Setup Schedule

Friday a.m.

Report Available

6 days

Performing Laboratory
Quest Diagnostics Nichols Institute
Valencia, CA

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.