Days Set Up
Monday - Friday
Analytic Time

3 - 10 days

Soft Order Code

Test Updated:


High Density Lipoprotein Cholesterol Fractions
HDL Cholesterol Subclasses
HDL Subfractions
Cholesterol, HDL Subfractions
HDL Fractions

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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

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Test Overview

Test Methodology

Precipitation, Colorimetric, Enzymatic

Test Usage
Reference Range

HDL-2 cholesterol: 9 - 38 mg/dL; HDL-3 cholesterol: 22 - 35 mg/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 (patient should be on a stable diet for 2 weeks and should fast for at least 12 hours prior to specimen collection). Centrifuge, aliquot serum into a plastic vial and freeze.

Yellow Top Tube
Normal Volume
3 mL serum
Minimum Volume
1.5 mL 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.