CKD Stage IV and V GFR Ranges
CKD Stage IV is defined as GFR 15-29 mL/min/1.73 m², and CKD Stage V is defined as GFR <15 mL/min/1.73 m² or requiring dialysis.
Detailed Staging
Multiple authoritative guidelines consistently define these stages 1, 2, 3, 4:
- Stage IV (Severe decrease in GFR): 15-29 mL/min/1.73 m²
- Stage V (Kidney failure): <15 mL/min/1.73 m² or patient requires chronic dialysis treatment
Clinical Context
Stage IV represents severely decreased kidney function where evaluation and treatment of complications becomes critical, along with preparation for renal replacement therapy 3. At this stage, patients require close monitoring and nephrology referral for dialysis planning.
Stage V represents kidney failure (also termed end-stage renal disease or ESRD) where renal replacement therapy is typically indicated 4. Some patients may require dialysis even when GFR is in the Stage IV range (15-29 mL/min/1.73 m²) if they develop uremic symptoms 4.
Important Clinical Considerations
- GFR should be estimated using validated equations (such as MDRD or CKD-EPI) rather than relying on serum creatinine alone, as creatinine can remain seemingly normal despite significantly declining GFR 3
- The presence of albuminuria at any GFR stage increases risk of progression and adverse outcomes 2, 5
- At Stage V, HbA1c becomes unreliable for glycemic monitoring in diabetic patients, and alternative measures should be considered 6
These definitions have been consistent across major guidelines since the early 2000s and remain the standard classification system used internationally 1, 2, 7, 8.