Kidney Function Test lab tests in DirectLabs Lab Test Test Cost Phosphate (as Phosphorus) - Phosphate test $26.00 Albumin (Microalbumin), 24 Hour Urine (Without Creatinine) $49.00 Albumin (Microalbumin), Random Urine With Creatinine $49.00 Creatinine, 24-hour Urine $47.00 Cystatin C with Glomerular Filtration Rate, Estimated (eGFR) $105.00 Creatinine - Serum Creatinine Test $26.00 Creatinine, Random Urine $34.00 Albumin, Serum - Albumin Blood Test $32.00 Potassium, Random Urine without Creatinine $39.00 Albumin (Microalbumin), Random Urine (Without Creatinine) $26.00 Renal Function Panel (Kidney) - Renal Function Panel $28.00 Kidney Profile, Extended $129.00 Urea Nitrogen, Serum (BUN) $32.00 Creatinine Clearance $79.00