Creatinine Clearance
Label Mnemonic: CRCL
Epic Lab Code: 263313 (order panel)
Downtime Form: A-1a General Laboratory Requisition
6240 RCP
Plasma & Urine
Specimen Instructions:
Draw blood during 24 hour urine collection. Record date and time of collection on requisition. Submit entire urine collection.
Collection Medium:
Plasma Separator Tube 4.5 mL Urine - 24 hour/timed plastic urine container
Alternate Collection Media:
Call laboratory for additional acceptable specimen collection containers.
3 mL whole blood in plasma separator tube and 24 hr urine with no preservative
Testing Schedule:
24 hrs/day, 7 days a week, including holidays.
Turn Around Time:
3 hours (upon receipt in laboratory)
Reference Range:
80-120 mL/min
In Epic, this is orderable as an order panel (263313) that orders both plasma creatinine (LAB66) and a 24 hr urine creatinine. The plasma creatinine must be collected at some time during the 24 hr urine collection for the creatinine clearance to be calculated.

Not corrected for body surface area. Collection other than 24 hr will not be calculated for G/24 hr. mg/dL and clearance will be calculated on any accurately timed urine. Call lab for nomogram for body surface determination.
Kinetic Colorimetric
CPT Code:
See Additional Information:
Urine Tests Requiring no Preservatives