Test Overview
Test Methodology


Test Usage

To assess glomerular filtration rate

Reference Range *

80 - 134 mL/min.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details
Days Set Up
Analytic Time

8 hours

Soft Order Code
MiChart Code
Creatinine Clearance, 24 HR Urine (Please also order LAB712)
  • Creat Clearance
  • CRCL
Chemical Pathology
Specimen Requirements
Collection Instructions

Collect blood in SST tube. Centrifuge, aliquot serum into a plastic vial and refrigerate. Collect 24 hour urine specimen with no preservative. Aliquot 10 ml into a plastic urine container and refrigerate. Record total 24 hour urine volume and collection dates/times on request form. Both a 24 hr urine creatinine and a serum creatinine must be ordered to obtain a calculated clearance. The serum creatinine must be drawn during the urine collection period. Note the patient's height and weight on the requisition for accurate calculation.

Alternate Specimen
Blood: Green top tube. Urine: Acid preservative.
Normal Volume
0.5 mL serum and 5 mL aliquot of 24 hour urine collection
Minimum Volume
0.25 mL serum and 2 mL aliquot of 24 hour urine collection
Additional Information

Creatinine Clearance (CRCL) is a calculated value based on serum and urine creatinine levels. There is no charge for the CRCL; the client or 3rd party will be billed for the serum and urine creatinine tests.

CPT Code