Days Set Up
Tuesday, Friday
Analytic Time

4 days

MiChart Code
Soft Order Code

Test Updated:



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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


Test Usage

Detection of nutritional deficiency as in anorexia nervosa or of excess of carotene as with food faddists; evidence of person with lipid malabsorption.

Reference Range

70 - 300 mcg/dl

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

Specimen Requirements

Collection Offsite

Collect blood in a red top or SST tube from a fasting patient (12 hour fast). Patient should not consume any alcohol for 24 hours prior to collection of specimen. Centrifuge, aliquot serum into plastic vial and freeze within 1 hour of collection. Protect specimen from light.

Yellow Top Tube
Normal Volume
2.0 mL fasting serum
Minimum Volume
1.5 mL fasting serum

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.