Laboratory Test Detail

Last Updated: April 25, 2024 @ 9:13 am

91172

Nortriptyline

Specimen:Collect:
  • One Red Top

Also Acceptable:
  • One Lavender (EDTA)
  • One Pink Top (EDTA)
Submit:
  • 1 mL (Min:0.5 mL) Serum in Standard Transport Tube. Submit Refrigerated. Submit in a Standard Transport Tube.

Also Acceptable:
  • 1 mL (Min:0.5 mL) Plasma in Standard Transport Tube. Submit Refrigerated. Submit in a Standard Transport Tube.
  • 1 mL (Min:0.5 mL) Plasma in Standard Transport Tube. Submit Refrigerated. Submit in a Standard Transport Tube.
Special Handling:
  • Separate from cells within 2 hours of collection
  • If amitriptyline administered, order Test # 91018 Amitriptyline/Nortriptyline.
    Timing of specimen collection: Pre-dose (trough) draw at steady - state concentration.
Rejection Criteria:
  • Light blue (Citrate)
  • Use of separator tubes
  • Whole blood
Stability:Ambient: 5 Day(s); Refrigerated: 2 Week(s); Frozen: 6 Month(s); Incubated: Unacceptable
Methodology:
  • Quantitative Liquid Chromatography-Tandem Mass Spectrometry
Performed:Monday, Wednesday, Friday
Reported:2-8 Day(s)
CPT Codes:
  • 80335
Components:
  • 91172 - NORTRIPTYLINE
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