Kidney function tests

Key facts Kidney function tests are blood tests that provide information about how well your kidneys are working. Kidney function tests can help your doctor check your kidney function over time. You should discuss the results of your kidney function blood test with your doctor to see what they mean in your situation. What are kidney function tests? Kidney function tests are a group of blood tests that provide information on how well your kidneys are working. Most people have 2 kidneys. They’re part of your urinary system. Kidneys have several important functions: filtering and cleaning your blood to remove waste products into