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.

Test Details

Days Test Performed

Daily, 24 hours

Analytic Time

2 hours

Soft Order Code

OSMOU

MiChart Code

Osmolality, Urine

Synonyms

Synonyms

OSMOLALITY, URINE
OSMOU

+ See More

Laboratory

Chemical Pathology

STAT Availability

STAT requests for this test will be performed on a STAT basis (supervisory staff approval is not required).

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.

Specimen Requirements

Offsite Collection Instructions

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.

Rejection Criteria

Specimens collected with Acid Preservative are not 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

Fee Codes


CPT Code

83935

LOINC

2695-5

Have More Billing Questions?

Explore our helpful billing resources:

Billing Resources


Billing FAQ