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 Set Up
Daily, 24 hours
Analytic Time

2 hours

Soft Order Code
OSMOU
MiChart Code
Osmolality, Urine
Synonyms
  • OSMOLALITY, URINE
  • OSMOU
Laboratory
Chemical Pathology
Section
Automation
STAT Availability

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

Specimen Requirements
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
CPT Code
83935
Fee Code
20741
LOINC
2695-5
Resources