Fentanyl and Metabolite
Label Mnemonic: FENU
Epic Lab Code: LAB7284
Commercial Mail-out Laboratory
5231 RCP
Random Urine
Collection Medium:
Yellow top round bottom tube (no additive)
Preferred Minimum: 4 mL urine (with no additives or preservatives)
Absolute Minimum: 0.5 mL urine
Rejection Criteria:
Specimens exposed to repeated freeze/thaw cycles.
Turn Around Time:
1-4 days upon receipt at reference laboratory
Reference Range:
Fentanyl - 1.0 ng/mL
Norfentanyl - 1.0 ng/mL
Interpretive Data:
For medical purposes only; not valid for forensic use. Drugs covered: fentanyl and metabolite (norfentanyl). Positive cutoff: 1.0 ng/mL. The absence of expected drug(s) and/or drug metabolite(s) may indicate non-compliance, 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. Interpretive questions should be directed to the laboratory.
Quantitative Liquid Chromatography-Tandem Mass Spectrometry
CPT Code:
See Additional Information:
Urine Tests Requiring no Preservatives