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UW Health SMPH
American Family Children's Hospital

UW Hospital and Clinics Lab Test Directory

Test Name: Protein/Creatinine Ratio

Test Code(s): UPRCR / HCUPCRC

CPT Code(s): 84156, 82570

Test Description: Test Component:

Urine protein, urine creatinine, and calculated ratio.  The protein/creatinine ratio will also be calculated and reported if a random urine creatinine and random urine protein are ordered on the same urine collection.

Days Performed: Daily, 24 hours.

Turnaround Time: Stat: 1 hour.
Routine: 4 hours.

Specimen Requirements

Specimen: Random urine

Collection Container: Preferred: Sterile screw cap container

Collection Volume: Preferred: Entire collection
Pediatrics: Entire collection

Sample Analyzed: Urine aliquot

Volume Required: Preferred: 1 mL
Pediatrics: 0.4 mL

Specimen Processing: Mix specimen.  Transfer up to 10 mL into a screw cap container.  Refrigerate specimen.  Do not freeze.

Specimen Transport: Transport entire specimen to UWHC Core Laboratory (B4/220) at close of collection.  Transport with coolant pack if coming from outreach location.

Unacceptable Criteria: Collection container contaminated with preservative is not acceptable.

Stability: Refrigerated: 7 days
Frozen: Not acceptable


Reference Interval:

 Protein/Creatinine calculated ratio:

 0 days - 24 months:  0.00 - 0.50
 25 months and up:    0.00 - 0.15


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