Looking to order a test?
We’ve provided helpful links to make ordering easy.Find a Requisition
All specimens should be accompanied by a requisition.Submitting Specimens
Learn about how to properly label and where to ship specimens.Order Kits and Supplies
MLabs provides all the supplies necessary for the collection of specimens.Test FAQ
Visit our provider FAQ and learn about common questions to ordering tests.
To assess glomerular filtration rate
80 - 134 mL/min.
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
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.