Test ID FNTSX Fentanyl and Metabolite, Chain of Custody, Serum
Useful For
Monitoring fentanyl therapy
Chain of custody is required whenever the results of testing could be used in a court of law. Its purpose is to protect the rights of the individual contributing the specimen by demonstrating that it was under the control of personnel involved with testing the specimen at all times; this control implies that the opportunity for specimen tampering would be limited.
Method Name
Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
Reporting Name
Fentanyl and metabolite, CoC, SSpecimen Type
Serum RedSpecimen Required
Supplies: Chain-of-Custody Kit (T282)
Collection Container/Tube: Red top (Serum gel/SST are not acceptable); Chain-of-Custody Kit containing the specimen seals and documentation required.
Submission Container/Tube: Plastic vial
Specimen Volume: 2.3 mL
Collection Instructions: Centrifuge and aliquot serum into plastic vial within 2 hours of collection.
Specimen Minimum Volume
1.25 mL
Specimen Stability Information
Specimen Type | Temperature | Time | Special Container |
---|---|---|---|
Serum Red | Frozen (preferred) | 14 days | |
Refrigerated | 14 days | ||
Ambient | 72 hours |
Reference Values
Not applicable
Day(s) Performed
Monday, Wednesday
Performing Laboratory

CPT Code Information
80354
G0480 (if appropriate)
LOINC Code Information
Test ID | Test Order Name | Order LOINC Value |
---|---|---|
FNTSX | Fentanyl and metabolite, CoC, S | 81275-0 |
Result ID | Test Result Name | Result LOINC Value |
---|---|---|
36302 | Norfentanyl | 11074-2 |
36303 | Fentanyl | 3636-8 |
36304 | Chain of Custody | 77202-0 |
Test Classification
This test was developed, and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the US Food and Drug Administration.Additional Tests
Test ID | Reporting Name | Available Separately | Always Performed |
---|---|---|---|
COCH | Chain of Custody Processing | No | Yes |
Report Available
2 to 7 daysNY State Approved
YesForms
1. Chain of Custody Request is included in the Chain-of-Custody Kit (T282).
2. If not ordering electronically, complete, print, and send a Therapeutics Test Request (T831) with the specimen.