Update Type: Test Resumed
Test Updated: 01/10/2024
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
    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]
    Normal Volume
    0.5 mL serum
    Minimum Volume
    0.25 mL serum
    Billing
    CPT Code
    83930
    Fee Code
    20740
    LOINC
    2692-2
    NY State Approved
    No