A B C D E F G H I J K L M N O P Q R S T U V W X Y Z #

OSMOLALITY SERUM

Test Code
SOSMO


Alias/See Also
OSS


CPT Codes
83930

Preferred Specimen
1.0 mL collected in a SST (serum seprator-gold top tube)


Minimum Volume
10


Specimen Stability
Room Temperature: Up to 24 hours
Refrigerated: Up to 24 hours
Frozen: Up to 14 days


Methodology
Freezing-point depression method is used to measure Osmolality.  Osmolality is the total solute concentration of an aqueous solution.

Reference Range
Serum: 285 – 310 mOsm/kg


Clinical Significance
Serum osmolality is increased in hypernatremia, hyperglycemia, uremia, ethanol, methanol, or ethylene glycol overdoses, and in diabetes insipidus.



Last Updated: October 9, 2018


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.