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Methadone and Metabolite. Serum/Plasma, Quant

Order Name Methad/Metab S/P
Test Number: 5613599
Revision Date 10/07/2020
Test Name Methodology LOINC Code
Methadone, S/P, Quant
Quantitative Liquid Chromatography/Tandem Mass Spectrometry 3772-1 
Quantitative Liquid Chromatography/Tandem Mass Spectrometry 60071-8 
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred 1 mL (0.5 mL) Serum Clot Activator (Red Top, No-Gel) Refrigerated
Alternate 1 1 mL (0.5 mL) Plasma EDTA (Lavender Top) Refrigerated
Alternate 2 1 mL (0.5 mL) Plasma Gray (sodium fluoride/potassium oxalate) Refrigerated
Alternate 3 1 mL (0.5 mL) Plasma Sodium Heparin (Green Top / No-Gel) Refrigerated
Instructions Separate serum or plasma from cells ASAP or within 2 hours of collection.
Transfer 1 mL (Min: 0.5 mL) serum or plasma to a Standard Transport Tube.

Unacceptable Conditions: Hemolyzed specimens. Specimens exposed to repeated freeze/thaw cycles. Separator tubes. Plasma or whole blood collected in lt. blue (sodium citrate).
Stability: After separation from cells: Ambient: 1 week; Refrigerated: 2 weeks; Frozen: 3 years
Testing Schedule Sun-Sat 
Expected TAT 1-4 days from set up  
Notes Reference Lab: ARUP
Test Code: 90699
Click Here to view information on the ARUP website.
CPT Code(s) 80358 (Alt G0480)
Lab Section Reference Lab