Feb 1, 2018




Clinical Hub,Tools & Resources,UWHC Lab Test Directory,Chemistry

Creatinine, Urine, Timed Collection

Creatinine, Urine, Timed Collection (UCRR) Chemistry Lab Test

Name: Creatinine, Urine, Timed Collection

Test Name: Creatinine, Urine, Timed Collection

Health Link Test Code: UCRR

LIS Test Code: RCRET

CPT Code(s): 82570

Methodology: Enzymatic

Days Performed: Daily, 24 hours.

In-Lab Turnaround Time: 4 hours.

Stat In-Lab Turnaround Time: 1 hour.

Specimen: Timed urine

Collection Container: 24 hour urine container or sterile screw cap container

Collection Instructions:

Collect timed urine (if collection period is for 22-26 hours lab will order test "Creatinine, Urine 24 Hour [UCR] or a creatinine clearance [HCCCLR] if requested). No preservative required. For timed urine collections, collect all urine in container provided. Add "Refrigerate" sticker to 24-hour container.


Collection period starts after first void of the period. It is very important to refrigerate specimen during and after the collection. Indicate the date and time collection started and date and time collection finished. If questions about collection process or container does not have instructions attached, call (608) 263-7060 for assistance.


Patient instructions available at www.uwhealth.org. Search for 24-hour urine collection or HF#4339.

Collection Volume: Entire collection

Stability Ambient:

2 days

Stability Refridgerated:

6 days

Stability Frozen:

6  months

Sample Analyzed: Urine aliquot

Testing Volume: 1 mL

Pediatric Testing Volume: 0.4 mL

Outreach Specimen Processing:

Mix urine well and note volume and period. Transport 50 mL aliquot on coolant pack to the laboratory along with volume and period information.

Specimen Transport:

Transport entire specimen to the laboratory at close of collection. Transport with coolant pack if coming from clinic location.


Results reported in mg/dL.

Additional Information:

Calculated urine creatinines only performed on creatinine clearance packages.