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Urea Nitrogen and Creatinine Profile

Test ID: 


CPT code:

82570, 84540


Creatinine and Urea, 24-Hour Urine
Urine Creatinine
Urine Urea Nitrogen

Clinical Use:

Renal function test

Specimen Type:

Urine (24-hour)

Requested Volume: 

10 mL aliquot of entire collection

Minimum Volume: 

1 mL aliquot

Container Type: 

Plastic urine container, no preservative


Instruct the patient to void at 8 AM and discard the specimen. Then collect all urine, including the final specimen voided at the end of the 24-hour collection period (ie, 8 AM the following morning). Fasten the lid securely. The container must be labeled with the patient’s full name, the date and time the collection began, and the date and time collection ended.

Storage Instructions:

Room temperature

Stability Requirements:



Room temperature

7 days


14 days


14 days

Freeze/thaw cycles

Stable x3



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