GFR Calculator for Adults¹ (patients 18 and older)
The National Kidney Foundation and American Diabetes Association have determined that GFR is the best overall index of kidney function.
When should a referral be made to a nephrologist?
- A patient with a GFR of 59 or lower (Stage 3, 4 & 5).
- Stage 1 and 2 referrals may also be beneficial in patients with chronic illnesses
such as diabetes and hypertension.
| Chronic Kidney Disease Stage |
Description |
GFR Value |
Clinical Action |
| Stage 1 |
Kidney damage with normal or increased GFR |
>=90 mL/min/1.73 m² |
Diagnosis and treatment;
Treating comorbid conditions;
Slowing progression;
CVD risk reduction |
| Stage 2 |
Kidney damage with mild decrease in GFR |
60 to 89 mL/min/1.73 m² |
Estimating progression |
| Stage 3 |
Moderate decrease in GFR |
30 to 59 mL/min/1.73 m² |
Evaluating and treating complications |
| Stage 4 |
Severe decrease in GFR |
15 to 29 mL/min/1.73 m² |
Preparing for renal replacement therapy |
| Stage 5 |
Kidney failure |
<15 mL/min/1.73 m² |
Renal replacement therapy |
How will we manage the patient?
- Stage 3 patients are managed through our chronic kidney disease (CKD) clinic to slow the progression of disease and delay the onset of end stage renal disease. When indicated, patients receive hypertension management, anemia management, management of metabolic complications of CKD, nutrition and social services.
- Stage 4 and 5 patients are managed through our CKD clinic and prepared for renal replacement therapy. We provide modality education (transplant, home dialysis, in-center dialysis, or no treatment) and coordinate dialysis access placement.
¹GFR (mL/min/1.73 m²) = 186 x Serum Creatinine-1.154 x Age-0.203 x 0.742 (if female) x 1.210 (if black). The equation does not require weight because the results are reported normalized to 1.73 m² body surface area which is an accepted average adult surface area.
Copyright 2007, Nephrology, Inc. All Rights Reserved.
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