Home
HelpTest Code FENR Fentanyl Screen with Reflex, Random, Urine
Reporting Name
Fentanyl Screen w/Reflex, UPerforming Laboratory
Mayo Clinic Laboratories in Rochester
Useful For
Screening for drug abuse or use involving fentanyl and confirmation of fentanyl if present in the screen
Method Name
Immunoassay
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, Urine.
For monitoring therapeutic drug levels, order FENTS / Fentanyl, Serum.
Additional Testing Requirements
If urine creatinine is required or adulteration of the sample is suspected, the ADULT / Adulterants Survey, Random, Urine test should also be ordered.
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.
Specimen Type
UrineSpecimen Minimum Volume
2.5 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Urine | Refrigerated (preferred) | 14 days | |
| Frozen | 14 days | ||
| Ambient | 72 hours |
Reject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.Reference Values
Negative
Screening cutoff concentration: 2 ng/mL
Interpretation
If the screen result is negative, fentanyl concentrations above 0.20 ng/mL were not detected.
If the screen result is positive, then confirmation by liquid chromatography tandem mass spectrometry will be performed.
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 Saturday
Report Available
Same day/1 to 2 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
80307
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| FENR | Fentanyl Screen w/Reflex, U | 59673-4 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 63060 | Fentanyl Screen, U | 59673-4 |
Forms
If not ordering electronically, complete, print, and send a Therapeutics Test Request (T831) with the specimen.
Profile Information
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| FENS | Fentanyl Screen, U | Yes | Yes |
Reflex Tests
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| FENTU | Fentanyl w/metabolite Conf, U | Yes | No |
Testing Algorithm
Testing begins with a screening assay. If the fentanyl screen is positive, then the liquid chromatography tandem mass spectrometry confirmation with quantification will be performed at an additional charge.