Osmolality, Serum : 677

Test Code
QOSMO or 677

CPT Codes
83930

Instructions
Serum separator tube (SST) or Plain red top tube.

Transport Container
Centrifuge the SST and transport. If plain red top tube, centrifuge and aliquot 1 mL (Min: 0.5 mL) serum into a standard transport tube.

Transport Temperature
Refrigerated.

Specimen Stability
After separation from cells: Room temperature: 4 days; Refrigerated: 5 days; Frozen: 14 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis, Grossly lipemic, Heparinized plasma, Grossly icteric

Methodology
Freezing Point Depression

Setup Schedule
Monday - Friday

Report Available
1-4 days (From receipt at performing laboratory)

Reference Range
278-305 mOsm/kg

Clinical Significance
Useful for the evaluation of fluid and electrolyte balance.

Performing Laboratory
Quest Diagnostics



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.