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Test Code 2818 Benzodiazepines Screen, Urine

Performing Laboratory

Barnes-Jewish Hospital Laboratory


Kinetic Interaction of Microparticles in Solution (KIMS) 

Literature Reference:

Benzodiazepines Plus (BENZ) package insert, Roche Diagnostics

Specimen Requirements

Specimen Type: Urine, random

Container/Tube: Yellow-top urine collection tube or plain red-top tube (full)

Specimen Volume: 10 mL

Collection Instructions: No additive.

Additional Information: See Urine Collection in Special Instructions for additional information.


Day(s) Test Set Up

Monday through Sunday
Turnaround Time:
STAT: Screening result available 1 hour after receipt in laboratory
Routine: Screening result available 3 hours after receipt in laboratory

Reference Values

Not present
Benzodiazepines confirmation available by request only and performed by Mayo Medical Laboratories. 

Immunoassay screen cut-off level: 200 ng/mL.
Note: Drug results are to be used only for medical purposes. All results, especially unconfirmed screening results, must not be used for non medical purposes.

Test Classification and CPT Coding

80307-Drug screen

Additional Information

For BJH Laboratory Use Only
Analyte Stability:
Specimen may be stored at ambient temperature for up to 1 week. Freeze specimen after 1 week.

Laboratory Processing Instructions:

Test performed in BJH Core Lab.  Processed by automated line for delivery to the Cobas 8000. Completed specimens are stored refrigerated for 5 days.

Specimen Transport Temperature


Special Instructions

LOINC Code Information

Name LOINC Code
Benzodiazepines Screen, Urine 14316-4