eGFR (Estimated Glomerular Filtration Rate)
A blood test that estimates how well your kidneys filter waste.
eGFR is calculated from creatinine, age, and sex. Above 90 is generally normal; under 60 for more than 3 months indicates chronic kidney disease. Many common medications need dose adjustment when eGFR drops.
Medically reviewed by Dr. Ikechukwu Ogbu, MD
MD · Board-Certified, Internal Medicine · Last reviewed June 2026