Test Overview
Test Methodology

Freezing Point

Test Usage

Evaluation of electrolyte balance, hyperosmolar status and hydration status.

Reference Range *

269 - 298 mOsm/kg

* 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
OSMO
MiChart Code
Osmolality, Serum
Synonyms
  • OSMOLALITY SERUM
  • OSMO
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 blood in SST or red top tube. Centrifuge, aliquot serum into a plastic vial and refrigerate.

Alternate Specimen
Sodium or lithium heparin acceptable. [4/99]
Yellow Top Tube
Normal Volume
0.5 mL serum
Minimum Volume
0.25 mL serum
Billing
CPT Code
83930
Fee Code
20740
LOINC
2692-2
Resources