Barbiturates Confirmation, Urine

Test Mnemonic


CPT Codes

  • G0480 - QTY (1)


  • Pentobarbital
  • Phenobarbital
  • Butalbital

Performing Laboratory


Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
1.5 mL     


Environmental Condition Description
Refrigerated1 month
Frozen3 years
Ambient1 week

Days Performed

Tue, Thu, Sat

Turnaround Time

2 - 5 days


Name Description
Quantitative Liquid Chromatography - Tandem Mass Spectrometry 

Reference Range

Clinical Info

Cutoff concentrations for all analytes: 50 ng/mL. For medical purposes only, not for forensic use. The absence of expected drug(s) and/or drug metabolite(s) may indicate noncompliance, inappropriate timing of specimen collection relative to drug administration, poor drug absorption, diluted/adulterated urine, or limitations of testing. The concentration value must be greater than or equal to the cutoff to be reported as positive.