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HelpTest Code FENTU Fentanyl with Metabolite Confirmation, Random, Urine
Reporting Name
Fentanyl w/metabolite Conf, UPerforming Laboratory
Mayo Clinic Laboratories in Rochester
Useful For
Detection and confirmation of illicit drug use involving fentanyl
Method Name
Liquid Chromatography Tandem Mass Spectrometry (LC-MS/MS)
Ordering Guidance
For situations where chain of custody is required, a Chain of Custody Kit (T282) is available. For chain-of-custody testing, order FENTX / Fentanyl with Metabolite Confirmation, Chain of Custody, Random, Urine.
Additional Testing Requirements
If urine creatinine is required or adulteration of the sample is suspected, the following test should also be ordered, ADULT / Adulterants Survey, Random, Urine.
Specimen Required
Supplies: Sarstedt Aliquot Tube, 5 mL (T914)
Collection Container/Tube: Clean, plastic urine collection container
Submission Container/Tube: Plastic, 5-mL tube
Specimen Volume: 5 mL
Collection Instructions:
1. Collect a random urine specimen.
2. No preservative.
Additional Information:
1. No specimen substitutions.
2. STAT requests are not accepted for this procedure.
3. Submitting less than 5 mL will compromise our ability to perform all necessary testing.
Specimen Type
UrineSpecimen Minimum Volume
2.1 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Urine | Refrigerated (preferred) | 28 days | |
| Frozen | 28 days | ||
| Ambient | 21 days |
Reject Due To
| Gross hemolysis | OK |
| Gross icterus | Reject |
Reference Values
Negative
Interpretation
The presence of fentanyl above 0.20 ng/mL or norfentanyl above 1.0 ng/mL is a strong indicator that the patient has used fentanyl.
Day(s) Performed
Monday through Friday
Report Available
4 to 7 daysTest Classification
This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.CPT Code Information
80354
G0480 (if appropriate)
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| FENTU | Fentanyl w/metabolite Conf, U | 67822-7 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 45530 | Fentanyl by LC-MS/MS | 58381-5 |
| 45531 | Norfentanyl by LC-MS/MS | 58383-1 |
| 45532 | Fentanyl Interpretation | 69050-3 |
Forms
If not ordering electronically, complete, print, and send a Therapeutics Test Request (T831) with the specimen.