Stool Osmolality

Message

Specimen must be shipped frozen to reduce the o Dor 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 1 mL random watery liquid fecal collected in a plastic screw-cap container , frozen -or-- 1 mL of a timed (24, or 48-hour) watery liquid fecal collected in a plastic screw-cap container , frozen

Test Code

LAB201 OSMFC

Alias/See Also

OSMFC

CPT Codes
84999

Includes

@BKRCERMSGREFRESH(2302793)@ @BKRCERMSGREFRESH(2302794)@

Instructions

Minimum Testing Volume: 0.2 mL Feces Transport Temperature: Frozen Stability: Ambient: N/A Refrigerated : 48 Hours Frozen: 60 Days Causes for Rejection: Specimens in paint cans; Formed stool; Specimens received room temperature; Specimens received Refrigerated

Report Available

5-Days

Clinical Significance

1230170831

Last Updated: May 18, 2026

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.