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OSMOLALITY-RANDOM URINE

Test Code
LAB420


CPT Codes
83935

Preferred Specimen
Random urine


Minimum Volume
0.2 mL


Transport Container
Plain urine container


Transport Temperature
Refrigerated


Methodology
Freezing Point Depression

Setup Schedule
Set Up:Monday thru Friday 10 AM cut off time/STATS DAILY Report Available:Routine 4 hr/ STAT 1hr


Reference Range
Osmolality Random Urine mOso/kg 50 - 1200


Clinical Significance
Osmolality measurements in urine are used in assessing the concentrating ability of the kidneys, since regulation of water excretion is, in part, determined by the osmolality of the fluid compartments of the body. In chronic progressive renal failure, the concentrating ability of the tubules is diminished, which may be demonstrated with a urine osmolality measurement. In polyuria due to diabetes insipidus, the urine osmolality is very low, and this may be used to differentiate this condition from polyuria of neurogenic origin.


Performing Laboratory
GBMC Chemistry



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.