Approximately 207 hyperphosphatemic CKD patients not on dialysis will be entered into this study at approximately 50 sites within approximately 9 European countries. The purpose of this study is to determine if sevelamer carbonate tablets dosed three times a day (TID) is a safe and effective treatment for the control of serum phosphorous levels in hyperphosphatemic CKD patients not on dialysis. Total length of participation is approximately 24 weeks.