Days Set Up
Wednesday, Friday
Analytic Time

8 hours

MiChart Code
Lamotrigine Level
Soft Order Code

Test Updated:



Looking to order a test?

We’ve provided helpful links to make ordering easy.

Find a Requisition

All specimens should be accompanied by a requisition.

Submitting Specimens

Learn about how to properly label and where to ship specimens.

Order Kits and Supplies

MLabs provides all the supplies necessary for the collection of specimens.

Test FAQ

Visit our provider FAQ and learn about common questions to ordering tests.

Test Overview

Test Methodology

Liquid Chromatography/Mass Spectrometry (LC/MS)

Test Usage

Therapeutic Monitoring, Assessing Compliance

Reference Range

The proposed therapeutic range for control of seizures is 3.0 - 14.0 mcg/mL. Drug pharmacokinetics varies widely, being especially affected by decreased renal function and co-medications.

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

Specimen Requirements

Collection Offsite

Collect specimen in a red top tube; do not use SST tube. A lavender (EDTA) or green top (Heparin) tube is also acceptable. Centrifuge, aliquot serum or plasma into a plastic vial, and refrigerate.

Red Top Tube
Normal Volume
1 mL serum or plasma
Minimum Volume
0.3 mL serum or plasma

Billing Information

CPT Code
Pro Fee Code

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Our High Standard

Quality that sets us apart

As the reference laboratory division of Michigan Medicine's Department of Pathology, MLabs shares the institution's commitment to applying established quality principles to clinical laboratory testing. Like other large organizations in complex, consequential fields, we rely on an established approach to monitor quality throughout the testing process.