Assessment of kidney function occurs in different ways, using the presence of symptoms and signs, as well as measurements using urine tests, blood tests, and medical imaging. Types of test 1:Urinalysis. A urinalysis screens for the presence of protein and blood in the urine. ... 2:Serum creatinine test. 3:This blood test examines whether creatinine is building up in your blood. ... 4:Blood urea nitrogen (BUN) ... 5:Estimated GFR.