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

Test Code
LAB107


CPT Codes
83930

Preferred Specimen
One 4.5 mL light green top tube 
Pediatric: One light green top microtainer


Other Acceptable Specimens
Dark green, red, or goldt op tube


Instructions
Sample must be centrifuged within two hours of collection. Serum/plasma (red or dark green top tube) must be removed from the red cells and put into aliquot tubes following centrifugation.  


Transport Temperature
Refrigerated


Specimen Stability
Unstable, centrifuge within two hours of collection  
Ambient: 24 hours  
Refrigerated: 7 days  
Frozen: 7 days


Methodology
Freezing Point Depression

Setup Schedule
Sunday-Saturday


Reference Range
Therapeutic level: 280-300 mOsm/kg
Critical levell: <=250 mOsm/kg or >=350 mOsm/kg


Performing Laboratory
West Virginia University Hospital, Inc.
Berkeley Medical Center
Camden Clark Medical Center
United Hospital Center
Uniontown Hospital
Wheeling Hospital




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.