Test Catalog

Test

Code
L325
Name
METHADONE AND METABOLITE SERUM OR PLASMA QUANTITATIVE
Notes
Description
Also known as: METHS, L325
Orderable Code: L325
Test Contains (LOINC): Methadone S/P Quant (3772-1), EDDP S/P Quant (60071-8)
SPECIMEN REQUIREMENTS
Sample Type: Plasma or Serum
Preferred Container: Potassium Oxalate/Sodium Fluoride (Gray Top) Tube
Alternate Container: Plain (Red Top) Tube, Sodium Heparin (Green Top) Tube or EDTA (Lavender Top) Tube
Sample Volume: 1.0 mL
Minimal Sample Volume: 0.5 mL
Handling Instructions
Separate serum or plasma from cells ASAP or within 2 hours of collection. Transfer 1 mL serum or plasma to a Standard Transport Tube.
Client Transport Temperature: Refrigerated
Specimen Stability: After separation from cells: Ambient: 1 week; Refrigerated: 2 weeks; Frozen: 3 years
Unsuitable Specimen: Separator tubes. Plasma or whole blood collected in lt. blue (sodium citrate). Specimens exposed to repeated freeze/thaw cycles. Hemolyzed specimens.
TESTING
Frequency: Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday
Expected Turn Around: 2 – 5 Days
Responsible Dept: Reference Lab
Referral Lab: ARUP
Referral Lab Code: 0090699
CPT: 80358 (Alt code: G0480)
Methodology: Quantitative Liquid Chromatography-Tandem Mass Spectrometry