Benzodiazurcfmmcnc
This test uses advanced laboratory methods to confirm the presence and amount of benzodiazepine drugs in your urine.
{"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"}
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
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?
Will this test show if I have a prescription?
Can anything else cause a positive result?
Is the test painful?
How long does it take to get results?
Sources
- 1
- 2
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
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