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

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.

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
Rejection Criteria
Specimens collected with Acid Preservative are not acceptable.
Billing
CPT Code
83935
Fee Code
20741
LOINC
2695-5
NY State Approved
No