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Benzodiazurcfmmcnc

Published: August 9, 2026Updated: August 16, 2026

This test uses advanced laboratory methods to confirm the presence and amount of benzodiazepine drugs in your urine.

Quick summary

{"This test checks for benzodiazepine medications in urine using confirmatory methods","It is more accurate than standard screening tests","Results help monitor medication use or detect misuse","The test can identify specific types of benzodiazepines","It is often used for medication compliance monitoring or in legal/employment settings"}

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
20412-3
Short code
BENZCONF
Synonyms
Benzodiaz Ur Cfm-mCnc
Category
chemistry
Sample
urine
Container
Sterile urine specimen container, no preservative required. For forensic testing, use tamper-evident container with chain of custody.
Units
N/A
Ref low
100
Ref high
300
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
confirm
CPT
80347
SNOMED
441632009
Specimen volume
30-50 mL random urine
Stability
Refrigerated (2-8°C): 7 days; Frozen (-20°C): 30 days; Room temperature (20-25°C): 3 days
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
24–72 hours
Order
routine

What is this test?

The Benzodiazepines Urine Confirmatory Test is a specialized laboratory test that uses advanced techniques to detect and measure specific benzodiazepine drugs in your urine. Unlike basic screening tests, this confirmatory method (typically using mass spectrometry) can precisely identify which benzodiazepine compounds are present and in what amounts.

What are benzodiazepines?

Benzodiazepines (often called 'benzos') are a class of prescription medications commonly used to treat anxiety, insomnia, muscle spasms, seizures, and panic disorders. Common examples include diazepam (Valium), alprazolam (Xanax), lorazepam (Ativan), and clonazepam (Klonopin). These medications work by calming the brain and nervous system.

Why is this test ordered?

This test may be ordered for several reasons: to verify the results of an initial screening test, to monitor patient compliance with prescribed benzodiazepine therapy, to detect misuse or unauthorized use of these medications, or as part of workplace, legal, or forensic testing. The confirmatory method provides more reliable and specific results than standard drug screens.

How is the test performed?

A urine sample is collected, typically in a medical facility or laboratory. The sample is then analyzed using sophisticated equipment like gas chromatography-mass spectrometry (GC-MS) or liquid chromatography-tandem mass spectrometry (LC-MS/MS). These methods can detect even small amounts of specific benzodiazepine drugs and their metabolites.

Are there any special instructions?

Follow any specific instructions provided by your healthcare provider or the testing facility. You should inform the clinician about all medications (prescription, over-the-counter, and supplements) you are taking, as some substances may affect test results. The test is typically performed on a random urine sample, so no special fasting is required.

Reference range

Negative: < cutoff (typically 100-300 ng/mL depending on specific benzodiazepine). Positive findings reported as ng/mL with specific benzodiazepine identification.N/A

Specimen: urine

No special preparation required. Patient should be informed that results may be used for medical, legal, or employment purposes. Chain of custody documentation may be required for forensic testing.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Frequently asked questions

How long do benzodiazepines stay detectable in urine?
Detection time varies depending on the specific drug, dosage, frequency of use, and individual metabolism. Generally, benzodiazepines can be detected in urine for 1-6 days after use, though some long-acting forms may be detectable for longer periods.
Will this test show if I have a prescription?
The test can detect the presence of benzodiazepines but typically does not distinguish between prescribed legal use and unauthorized use. If you have a valid prescription, inform the testing facility or your healthcare provider beforehand to help interpret the results appropriately.
Can anything else cause a positive result?
This confirmatory test is highly specific and uses mass spectrometry to identify exact compounds, greatly reducing the chance of false positives. However, always disclose all medications and supplements to your healthcare provider for accurate interpretation.
Is the test painful?
No, the test only requires a urine sample, which is painless. You will be asked to provide a urine sample in a private collection container.
How long does it take to get results?
Confirmatory tests are more complex than standard screens and typically take 2-5 days to complete. The exact timeframe depends on the laboratory and specific testing protocols.
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy