Kidney Function Test lab tests in Lab Testing API Lab Test Test Cost BUN/Creatinine Ratio Blood Test $25.00 Phosphate (as Phosphorus) Blood Test - Phosphate test $24.00 Ammonia Plasma Blood Test - Ammonia Blood Test $37.50 Renal Function Panel Blood Test - Renal Function Panel $26.50 Blood Urea Nitrogen Blood Test (BUN) $25.00 Albumin Blood Test (ALB) - Albumin Blood Test $24.00 Creatinine Blood Test - Serum Creatinine Test $24.00 Microalbumin Random Urine with Creatinine Test $52.50 Creatinine Clearance Test $43.00