Test Directory
BENZODIAZEPINE CONFIRMATION (GCZ)
Department: Toxicology
Test Synonym(s): GCZ
Test Components: Alprazolam metabolite, Clonazepam metabolite, Diazepam, Lorazepam, Midazolam metabolite, Nordiazepam, Oxazepam and Temazepam
CPT Codes: 80102
Methodology: GC/ECD
Reference Range: No drugs detected. Cut-off is 100 ng/mL
Tube Type: Routine urine container (15 mL)
Specimen: Urine
Alternate Specimen: None
Volume: 5 mL
Minimum Volume: 1 mL
Temperature: Refrigerated if not delivered immediately
Stability: Refrigerated (2-8° C): 7 days, frozen ( -15° C): 6 months
Reasons for Rejection: QNS
Days Performed: Monday - Friday
Times Performed: During second shift
TAT: 48 - 72 hours. Not available STAT
Special Instructions: Send to lab immediately
Search Tests
Search Help
Search Options for the Test Directory:
1. Enter the test name in the Keyword search field.
Hint: You can also enter any part of the test name to expand the search.
(Example: you can type "west" or "sed" or "rate" to find Westergren Sedimentation Rate)
2. Enter the Vanderbilt Test Code, if known.
3. Choose one of the letter boxes to display a list of all test names and keywords starting with that letter.
If you are unable to find a test in our directory, please contact VPLS at
1-800-551-5227 or e-mail emily.k.thompson@vanderbilt.edu.