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Methadone and Metabolites, Serum

Additional Codes


Specimen Type

Serum Red

Specimen 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) and Time(s) Performed

Monday, Wednesday, Friday

Analytic Time

2 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information


G0480 (if appropriate)

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


If not ordering electronically, complete, print, and send a Therapeutics Test Request (T831) with the specimen.