Kidney Glomerular Filtration Rate (GFR) in USA is a key medical measure used to assess how well the kidneys are filtering waste and excess fluids from the blood. In the United States, GFR testing plays an important role in the early detection, diagnosis, and monitoring of chronic kidney disease (CKD). Doctors commonly estimate GFR through blood tests, considering factors like age and gender. Maintaining a healthy GFR helps reduce the risk of kidney failure and related complications.