Test Overview
Test Methodology


Test Usage

To assess glomerular filtration rate

Reference Range *

80 - 134 mL/min.

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.

Yellow Top Tube
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
NY State Approved