Days Set Up
Daily
Analytic Time

4 - 8 days

Soft Order Code
MMLR

Test Updated:

Synonyms
 

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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/Tandem Mass Spectrometry (LC-MS/MS)

Test Usage

Therapeutic drug monitoring.

Reference Range

< 235 ng/mL

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

Specimen Requirements

Offsite Collection Instructions

Collect specimen in a red top tube; do not use SST tube. Centrifuge, aliquot serum into a plastic vial and refrigerate. For maximum clinical significance, usual sampling times are Peak: 1 hour after administration of oral dose or Trough: immediately before next dose is given. Indicate whether specimen is Peak, Trough, or Random level.

Yellow Top Tube
Red Top Tube
Normal Volume
3 mL serum
Minimum Volume
0.6 mL serum

Billing Information

CPT Code
80199
Pro Fee Code
 
Insurance Auth Info
 
LOINC
21565-7

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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.