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Methadone, Confirmation
Test Code3258x
CPT Codes
83840
Preferred Specimen
4.0 mL of whole blood Red top tube (2.0 mL of serum/plasma)
Minimum Volume
2.0 mL of whole blood Red top tube (1.0 mL of serum/plasma)
Other Acceptable Specimens
EDTA (lavender top), Sodium heparin (green top), Lithium Heparin (green top), Fluoride/Oxalate (gray top)
Transport Container
Red top
Transport Temperature
Refrigerated
Specimen Stability
Room Temperature: 5 days
Refrigerated: 14 days
Frozen: 1 year
Refrigerated: 14 days
Frozen: 1 year
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Specimens collected in a tube containing gel.
Methodology
Gas Chromatography/Mass Spectrometry (GC/MS)
Setup Schedule
Monday through Friday
Report Available
Available in 3 days of receipt at Quest Diagnostics.
