Renal Insufficiency [Disease/Finding] Renal Insufficiency, Chronic [Disease/Finding] 236425005 Conditions in which the KIDNEYS perform below the normal level for more than three months. Chronic kidney insufficiency is classified by five stages according to the decline in GLOMERULAR FILTRATION RATE and the degree of kidney damage (as measured by the level of PROTEINURIA). The most severe form is the end-stage renal disease (CHRONIC KIDNEY FAILURE). (Kidney Foundation: Kidney Disease Outcome Quality Initiative, 2002) Chronic Kidney Insufficiency M0480472 1025359 N0000171643 C7769506596229 Renal Insufficiency, Chronic Renal Insufficiency, Chronic C0403447 Chronic Renal Insufficiency D051436 Kidney Insufficiency, Chronic