Types of kidney function tests include urinalysis and a blood urea nitrogen test, according to Healthline. Other types of kidney function tests are a serum creatinine test and an estimated glomerular filtration rate test.
Urinalysis is a kidney function test that determines if the urine contains protein or blood, notes Healthline. A blood urea nitrogen test, or BUN test, determines the quantity of blood urea nitrogen, which is a waste product that forms when protein is broken down in the body. Because certain drugs and supplements may elevate blood urea nitrogen, it is crucial to stop ingesting such substances a couple of days prior to the test to ensure that any increased level of blood urea nitrogen is due only to kidney damage.