Chronic kidney disease, CKD, is divided into 5 stages based on levels of kidney function. Your CKD stage is determined by calculating your estimated glomerular filtration rate, eGFR, which is a measurement of how well your kidneys are cleaning your blood. The goal at each of the CKD stages is to take the best care and control of your health, so you can help slow the progression of CKD and keep your kidneys working as long as possible.