Cystatin C with Glomerular Filtration Rate, Estimated (eGFR)
Fasting Required: Yes 10-12 Hours

Specimen: Blood

Results: 5-7 Business Days

Description: Your body makes cystatin C constantly, and the protein is found in different fluids, including blood, spinal fluid, and breast milk. When your kidneys are healthy, they filter cystatin C out of the blood so it can be excreted in your urine.

Cystatin C may be used as an alternative to creatinine and creatinine clearance to screen for and monitor kidney dysfunction in those with known or suspected kidney disease. It may be especially useful in those cases where creatinine measurement is not appropriate, for instance, in those who have liver cirrhosis, are very obese, are malnourished, or have reduced muscle mass. Higher levels of cystatin C may also be caused by diabetes, cancer, HIV, hyperthyroidism, or hypothyroidism.

Methodology: Nephelometry

Note: Result turnaround times are an estimate and are not guaranteed. Our reference lab may need additional time due to weather, holidays, confirmation/repeat testing, or equipment maintenance.