Days Set Up
Monday - Friday
Analytic Time

3 - 7 days

MiChart Code
Oxalate Plasma (Sendout)
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

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Test Overview

Test Methodology


Test Usage

Assessing the body pool size of oxalate.

Reference Range

< or = 2.0 mcmol/L. Reference values have not been established for patients under 21 and greater than 81 years of age.

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

Specimen Requirements

Collection Onsite

Place tube on ice after collection. Must be processed within one hour. Deliver to Specimen Processing immediately.

Collection Offsite

Patient should avoid taking vitamin C supplements for 24 hours prior to specimen collection. Collect specimen in sufficient green top tubes from a fasting patient. Place on wet ice immediately following collection. Centrifuge for 10 minutes at 2,000 rpm at 4 degrees C within 1 hour of collection and aliquot plasma into a plastic vial. Adjust the pH of the plasma specimen to a pH of 1 to 3.5 (ideal range is 2.3-2.7) with approximately 10 mcL concentrated (12N) HCl per 1 mL plasma or deliver to MLabs within 1 hour of collection. Freeze.

Normal Volume
5 mL plasma
Minimum Volume
2 mL 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.