Urea Nitrogen and Creatinine Profile, 24-Hour Urine

CPT: 82570; 84540
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  • Creatinine and Urea, 24-Hour Urine
  • Urine Creatinine
  • Urine Urea Nitrogen

Test Includes

Creatinine, 24-hour urine; creatinine, urine; eGFR calculation; urea nitrogen, 24-hour urine; urea nitrogen, urine

Special Instructions

State total 24-hour urine volume on the request form.

Expected Turnaround Time

Within 1 day

Related Information

Related Documents

Specimen Requirements


Urine (24-hour)


10 mL aliquot of entire collection

Minimum Volume

1 mL aliquot


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

Test Details


Renal function test


Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
317222 UREA and Creatinine, 24-Hr Ur 81232-1 013672 Creatinine, Urine mg/dL 2161-8
317222 UREA and Creatinine, 24-Hr Ur 81232-1 013227 Creatinine, Ur 24hr mg/24 hr 2162-6
317222 UREA and Creatinine, 24-Hr Ur 81232-1 013508 Urea Nitrogen, U mg/dL 3095-7
317222 UREA and Creatinine, 24-Hr Ur 81232-1 013236 Urea Nitrogen, 24hr g/24 hr 3096-5

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