Hi, Please advise as my serum phosphorus is 4.6 and serum chloride is 98 ( it was 103) last week. This came in blood report for preventive health checkup. Just to add: i had RIRS surgery one month back for kidney stone and ureter stone. Please let me know what needs to be done for high phosphorus and serum chloride. Other KFT parameters are normal. Kidney Function Test1 (KFT1) Serum Creatinine Method: Jaffes Kinetic 0.96 mg/dl 0.9-1.3 Serum Uric Acid Method: Uricase 4.9 mg/dl 3.5-7.2 Serum Calcium Method: Arsenazo 9.9 mg/dl 8.8 - 10.6 Serum Phosphorus Method: Phosphomolybdate complex 4.6 mg/dl 2.5 - 4.5 Serum Sodium Method: ISE (Indirect) 142 mmol/L 136 - 146 Serum Chloride Method: ISE (Indirect) 98 mmol/L 101 - 109 Blood Urea Method: Urease 24 mg/dl 17 - 43 Blood Urea Nitrogen (BUN) Method: Calculated 11.1 mg/dl 8-20 Bun/Creatinine Ratio Method: Calculated 11.53 Ratio Urea/Creatinine Ratio Method: Calculated 24.69 Ratio