Kidney Function Test lab tests in Lab Testing API Lab Test Test Cost Blood Urea Nitrogen Blood Test (BUN) $32.00 Renal Function Panel Blood Test - Renal Function Panel $34.00 Phosphate (as Phosphorus) Blood Test - Phosphate test $31.00 Creatinine Blood Test - Serum Creatinine Test $31.00 BUN/Creatinine Ratio Blood Test $32.00 Ammonia Plasma Blood Test - Ammonia Blood Test $48.00 Creatinine Clearance Test $55.00 Albumin Blood Test (ALB) - Albumin Blood Test $34.00 Microalbumin Random Urine with Creatinine Test $67.00