I feel mild pain in my lower back most of the time. I had kidney stone couple of months ago. So I went for kidney function test. And Dr. Said report is good My questions. Do I need other kidneys test like urine or blood. So I can sure about there is no problem with my kidney. Urea 19.11 mg/d Creatinine 0.81 mg/dL Uric Acid 4.58 mg/d Calcium, Total 9.79 mg/dL Phosphorus 3.50 mg/dL 2.50 Alkaline Phosphatase (A Total Protein 7.24 Albumin 4.71 A: G Ratio 1.86 Sodium 140.00 Potassium 3.90 mEq Chloride 106.00.