Test Overview
Test Methodology

Liquid Chromatography - Tandem Mass Spectrometry (LC-MS/MS)

Test Usage

Monitor therapeutic drug levels; monitor patient compliance; evaluate nortriptyline toxicity

Reference Range *

Therapeutic: 50-150 ng/mL, Toxic: > 500 ng/mL.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details
Days Set Up
Thursday
Analytic Time

4 hours

Soft Order Code
NORT
MiChart Code
Nortriptyline Level
Synonyms
  • Aventyl
  • Pamelor
  • Tricyclics, Nortriptyline
  • NORT
  • NORTRIPTYLINE
  • NORTRIPTYLINE LEVEL
Laboratory
Chemical Pathology
Section
Drug Analysis
Specimen Requirements
Collection Instructions

Collect blood in a red top or green top tube; do not use SST tube. Centrifuge, aliquot serum or plasma into plastic vial as soon as possible and refrigerate.

Alternate Specimen
Laveder top (EDTA plasma) [11/09]
Rejection Criteria
SST or PST tube not acceptable.
Yellow Top Tube
Red Top Tube
Normal Volume
1 mL serum or plasma
Minimum Volume
0.7 mL serum or plasma
Billing
CPT Code
80335
Fee Code
20022
LOINC
3872-9
Resources