Days Set Up
Daily, 24 hours
Analytic Time

2 hours

MiChart Code
Osmolality, Urine
Soft Order Code
OSMOU

Test Updated:

Synonyms

OSMOLALITY, URINE
OSMOU

Looking to order a test?

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

Freezing Point

Test Usage

To aid in evaluation of water balance and kidney function.

Reference Range

300 - 1300 mOsm/kg for random specimens

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

Specimen Requirements

Collection Onsite

Random urine or timed specimen.

Collection Offsite

Collect 24 hour urine specimen with no preservative. Aliquot 2 mL into a plastic urine container and refrigerate. Record total 24 hour urine volume and collection dates/times on request form. Random urine is also acceptable.

Normal Volume
2 mL aliquot of random or 24 hour urine collection
Minimum Volume
0.5 mL aliquot of random or 24 hour urine collection

Billing Information

CPT Code
83935
Pro Fee Code
 
LOINC
2695-5

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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.