Stage 1: Kidney damage with normal or increased GFR (â¥90 mL/min) Stage 2: Kidney damage with mild decrease in GFR (60-89 mL/min) Stage 3: Moderate decrease in GFR (30-59 mL/min) Stage 4: Severe decrease in GFR (15-29 mL/min) Stage 5: Kidney failure (GFR
