Kidney Function Test lab tests in Walk-In Lab Lab Test Test Cost Creatinine Urine Test, 24-Hour $47.00 Cystatin C Blood Test $105.00 Phosphorus Serum Test $34.00 Microalbumin/Creatinine Ratio Urine Test, Random $49.00 Urea Nitrogen (BUN) Serum Test $34.00 Microalbumin Urine Test, Random - Microalbumin Urine Test $39.00 Ammonia Plasma Test - Ammonia Blood Test $44.00 Albumin Serum Test $29.00 Urea Nitrogen (BUN) Serum Test $34.00 Creatinine Clearance 24-Hour Urine and Blood Test $59.00 Creatinine Urine Test, Random $34.00 Phosphorus Serum Test - Phosphate test $34.00 Albumin Serum Test - Albumin Blood Test $29.00 Renal Function Blood Test Panel - Renal Function Panel $29.00 Microalbumin/Creatinine Ratio Urine Test, Random $49.00 Creatinine Serum Test - Serum Creatinine Test $34.00 Microalbumin Urine Test, 24-Hour $45.00