Kidney Function Test lab tests in Health Tests Direct Lab Test Test Cost Albumin - Albumin Blood Test $26.56 Phosphate (As Phosphorus) - Phosphate test $24.33 Creatinine Clearance $42.30 Microalbumin, 24-Hour Urine without Creatinine $42.28 Renal Function Panel w/ EGFR - Renal Function Panel $25.49 Microalbumin w/ Creatinine Urine $59.93 Urea Nitrogen (Bun) $36.44 Microalbumin:Creatinine Ratio, Random Urine $57.75 Ammonia, Plasma - Ammonia Blood Test $42.24 Creatinine, Random Urine $37.76 Creatinine - Serum Creatinine Test $34.87 Cystatin C (Note: necessary lab process requires 8-9 days to receive results) $55.78 Microalbumin:Creatinine Ratio, Random Urine $57.75