Days Set Up
Thursday
Analytic Time
3 days
Soft Order Code
MMLR
Test Updated:
Synonyms
Looking to order a test?
We’ve provided helpful links to make ordering easy.
Find a RequisitionAll specimens should be accompanied by a requisition.
Submitting SpecimensLearn about how to properly label and where to ship specimens.
Order Kits and SuppliesMLabs provides all the supplies necessary for the collection of specimens.
Test FAQVisit our provider FAQ and learn about common questions to ordering tests.
Test Overview
Test Methodology
Gas Chromatography (GC)
Test Usage
Therapeutic drug monitoring.
Reference Range
* 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. Centrifuge, aliquot serum into a plastic vial and freeze. Protect specimen from light. EDTA (lavender top) or heparinized (green top) plasma is also acceptable.
Billing Information
CPT Code
80338
Pro Fee Code
LOINC
9778-2