Days Set Up
Monday, Wednesday, Friday
Analytic Time

2 - 7 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

Electrochemiluminescent Assay

Test Usage

As part of the diagnostic workup of suspected insulinoma; as part of the diagnostic workup of patients with suspected prohormone convertases1/3 deficiency; as part of the diagnostic workup of patients with suspected proinsulin mutations.

Reference Range

3.6 - 22 pmol/L

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

Specimen Requirements

Collection Offsite

Collect specimen in a chilled lavender top tube from a fasting patient. Chill the whole blood on ice for at least 10 minutes, spin down in a refrigerated centrifuge, aliquot plasma into a plastic vial and freeze. If specimen processing equipment is not available, the patient should have the specimen collected at a UM Medical Center Center Blood Drawing station.

Lavender Top Tube
Normal Volume
0.5 mL EDTA plasma
Minimum Volume
0.25 mL EDTA 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.