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973: Urea Nitrogen, 24-hour Urine without Creatinine Print View
Urea Nitrogen, 24 hr urine CALC  6 - 17  g/24 h 
Total Volume     mL 

PRIMARY
1 Urine 24 hour 10 (2) mL   Refrigerated - 7 Day(s)/Frozen - 30 Day(s)/Room Temperature - 24 Hour(s)  
ALTERNATE
  Urine with HCL 24 hour   Refrigerated - 7 Day(s)/Room Temperature - 48 Hour(s)/Frozen - 30 Day(s)  

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 elemination; 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.

10 mL urine aliqout from a well-mixed 24-hour collection.
Do not include first morning specimen in 24-hour collection.
Collect all subsequent voiding. The last sample collected
should be the first specimen voided the following morning
at the same time as the previous morning's first void.
Record the total volume of urine and collection time on
both the transport container and test requisition.


Also acceptable: Urine preserved with 6N HCL to maintain
a pH of <6.0.
Setup Schedule
Monday-Saturday

Reported (Analytical Time)
Same day

CPT Code
84540

The CPT codes provided 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 payer being billed.






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