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500375M
METHADONE, SERUM

Test Code 500375M 
Test METHADONE, SERUM 
Methodology Gas Chromatography-Mass Spectrometry (GC-MS) 
Specimen Draw blood in a plain, red-top tube(s). Spin down and send 4.5 mL (minimum: 2.1 mL) of serum refrigerated. 
Reference Values Single dose: 30 - 90 ng/mL
Maintenance dose: 400 - 1,000 ng/mL 
Analytic Time 1 Day 
Day(s) Test Set Up Monday through Friday 
CPT Code(s) 83840