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Test Code MDNS Methadone and Metabolites, Serum

Important Note

When drawing for a Methadone Peak and Trough

Trough is drawn Prior to the Dose of Methadone,

Peak is drawn exactly 4 hrs after the dose is taken (patients may leave between draws)

Random samples are also excepted

Useful For

Compliance monitoring of methadone

 

Assessment of methadone toxicity

Reporting Name

Methadone and Metabolite, S

Specimen Type

Serum Red


Specimen Required


Supplies: Sarstedt Aliquot Tube, 5 mL (T914)

Container/Tube: Red top (Serum gel/SST are not acceptable)

Submission Container/Tube: Plastic vial

Specimen Volume: 1.0 mL

Collection Instructions: Within 2 hours of collection, centrifuge and aliquot serum into a plastic vial.


Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Red Refrigerated (preferred) 28 days
  Frozen  28 days
  Ambient  14 days

Reject Due To

Gross hemolysis OK
Gross lipemia OK
Gross icterus OK

Reference Values

Not established

Day(s) Performed

Tuesday, Thursday

Report Available

3 to 5 days

Performing 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

Forms

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

Specimen Retention Time

14 days