Days Set Up
Daily, 24 hrs
Analytic Time

2 hours

MiChart Code
Valproic Acid Level, Free
Soft Order Code

Test Updated:


Depakene, Protein Free
Free Depakene
Free Valproic Acid

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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

Homogeneous Enzyme Immunoassay

Test Usage

Monitor therapeutic drug level, compliance, evaluate valproic acid toxicity

Reference Range

2-10 mcg/mL (approximately 10% of the total drug concentration); Toxic >15 mcg/mL.

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

Specimen Requirements

Collection Onsite

Collect blood in a red top.

Collection Offsite

Collect blood in a red top tube. Centrifuge, aliquot serum into a plastic vial, and refrigerate.

Yellow Top Tube
Normal Volume
1 mL serum or plasma
Minimum Volume
0.75 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.