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 #

Urea Nitrogen, 24-Hour Urine without Creatinine

Test Code
24UUREA


CPT Codes
84540

Preferred Specimen
10 mL urine aliquot from a 24-hour collection - no preservative See Urine in the Blood, Urine and Stool section in Specimen Collection and Handling.


Instructions
Aliquot from a well-mixed, 24-hour collection.Record total volume on both the transport container and the test requisition.


Transport Container
Plastic screw-capcontainer


Transport Temperature
Refrigerated (cold packs)


Methodology
Spectrophotometry (SP)

Reference Range
6-17 g/24 h


Clinical Significance
About 80% of urinary nitrogen is in the form of urea which is the major end product of protein metabolism.Urea excreted in the urine is the primary method of nitrogen elimination; therefore, this test provides an approximate evaluation of nitrogen balance. Conditions associated with increased urine urea nitrogen are hyperthyroidism, high protein diets and post-operative states. Decreased levels are associated with convalescence, liver disease, toxemia and advanced renal disease.




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.