What Is Egfr Test ? Home » Questions » Heart & Cardio » What Is Egfr Test ? 0 Vote Up Vote Down Anonymous asked 8 years ago Our doctor wrote that I need to get an eGFR test ? What is this for ? 1 Answers 0 Vote Up Vote Down Uma Maheshwari - Dietitian Staff answered 8 years ago Hi, eGFR – Glomerular filtration Rate. This test is done to check the function of the kidney. Regards, Uma Maheshwari PS