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HelpTest Code LAB93831 Methadone and Metabolites, Serum
Test Down Notes
This test is temporarily unavailable due to instrumentation issues. As an alternate, order FMTMS. For additional details, see test update here.
Useful For
Compliance monitoring of methadone
Assessment of methadone toxicity
Method Name
Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
Reporting Name
Methadone and Metabolite, SSpecimen Type
Serum RedSpecimen Required
Container/Tube: Red top (Serum gel/SST are not acceptable)
Submission Container/Tube: Plastic vial
Specimen Volume: 0.5 mL
Collection Instructions: Centrifuge and aliquot serum into plastic vial within 2 hours of collection.
Specimen Minimum Volume
0.2 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum Red | Refrigerated (preferred) | 14 days | |
| Ambient | 14 days | ||
| Frozen | 14 days |
Reference Values
Not established
Day(s) Performed
Tuesday, Thursday, Sunday
Report Available
3 to 5 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
80299
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| MDNS | Methadone and Metabolite, S | 96602-8 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 36309 | Methadone | 3772-1 |
| 36310 | EDDP | 60071-8 |
Test 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.Forms
If not ordering electronically, complete, print, and send a Therapeutics Test Request (T831) with the specimen.