Osmolality, Stool

Test Code
STOSM


Quest Code
968


CPT Codes
84999

Preferred Specimen
1 mL random watery liquid fecal collected in a plastic screw-cap container or 24-hour or 48-hour watery liquid fecal collected in a plastic screw-cap container


Minimum Volume
0.2 mL


Instructions
Specimen must be shipped frozen to reduce the odor during shipping and to minimize the risk of the container rupturing due to gas accumulation.

Note: This test only has clinical utility if performed on a watery fecal specimen.
Stable up to 3 freeze-thaw cycles


Transport Temperature
Frozen


Specimen Stability
Room temperature: Unacceptable
Refrigerated: 48 hours
Frozen: 60 days


Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Specimens in paint cans • Formed stool • Specimens received room temperature • Specimens received refrigerated


Methodology
Freezing Point Depression

Setup Schedule
Set up: Sun-Fri; Report available: 3 days


Reference Range
Not established


Performing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153



The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.