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Vanderbilt Pathology Laboratory Services

Test Directory



METHADONE CONFIRMATION (GCM)

Department: Toxicology
Test Synonym(s): GCM
Test Components: Methadone and/or metabolites
CPT Codes: 80102
Methodology: GC/MS
Reference Range: Methadone, and metabolites EDDP and EMDP. Samples adultered by addition of Methadone will be negative for metabolites, but positive on immunoassay. Please specify if LAAM analysis is required.
Tube Type: Routine urine container
Specimen: Urine
Volume: 5 mL
Minimum Volume: 1 mL
Temperature: Refrigerated if not delivered to the lab immediately
Stability: Refrigerated: 7 days, frozen at -15 C: 6 months
Reasons for Rejection: QNS
Days Performed: Monday - Friday. Not available STAT
TAT: 48 - 72 hours
Special Instructions: Send to the lab immediately

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