Days Set Up
Daily, 24 hours
Analytic Time

2 - 4 hours

MiChart Code
Westergren Sedimentation Rate
Soft Order Code

Test Updated:


Erythrocyte Sedimentation Rate, Westergren
ESR, Westergren
Sed Rate, Westergren
Westergren Sedimentation Rate

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We’ve provided helpful links to make ordering easy.

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

iSED analyzer

Test Usage

Is often used to monitor the effectiveness of therapy in inflammatory diseases.

Reference Range

Male: 0-15 mm/hour; Female: 0-20 mm/hour

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

Specimen Requirements


Liquid EDTA K3 collection tubes are not acceptable and will be rejected due to possible dilutional effects.

Collection Onsite

Collect specimen in a lavender top EDTA K2 Vacutainer® tube. Send intact at room temperature within 8 hours of collection.

Collection Offsite

Collect specimen in a lavender top EDTA K2 Vacutainer® tube. Send intact whole blood specimen at room temperature within 8 hours of collection, or within 24 hours if refrigerated.

Lavender Top Tube
Normal Volume
3 mL EDTA K2 whole blood
Minimum Volume
1 mL EDTA K2 whole blood

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.