DaVita.com Kidney Education http://www.davita.com DaVita provides a complete range of dialysis treatments and support services for patients living with chronic kidney failure, also known as end stage renal disease, or ESRD. What Is Creatinine? http://www.davita.com/kidney-disease-overview/symptoms and diagnosis/what-is-creatinine?/a/4726

Have you ever heard your doctor or nurse discuss your creatinine level? Creatinine is a chemical waste product that is released into the blood when muscles contract. With good kidney function, creatinine is filtered from the blood through the kidneys. When creatinine levels are high, it can be an indicator of kidney disease. Doctors will order a blood test for serum creatinine levels to determine kidney function and use the number to calculate glomerular filtration rate (GFR), which can determine the stage of chronic kidney disease.