Kidney Function Test lab tests in Walk-In Lab Lab Test Test Cost Phosphorus Serum Test - Phosphate test $26.00 Microalbumin/Creatinine Ratio Urine Test, Random $61.00 Microalbumin Urine Test, 24-Hour $50.00 Urea Nitrogen (BUN) Serum Test $32.00 Cystatin C Blood Test $95.00 Microalbumin Urine Test, Random - Microalbumin Urine Test $38.00 Renal Function (Kidney) Blood Test Panel - Renal Function Panel $28.00 Albumin Serum Test - Albumin Blood Test $28.00 Creatinine Serum Test - Serum Creatinine Test $31.00 Creatinine Urine Test, Random $37.00 Creatinine Urine Test, 24-Hour $55.00 Ammonia Plasma Test - Ammonia Blood Test $38.00 Microalbumin/Creatinine Ratio Urine Test, Random $59.00 Creatinine Clearance 24-Hour Urine and Blood Test $59.00 Cystatin C Blood Test $55.00