Hyperphosphatemia is an electrolyte disorder in which there is a higher-than-normal level of phosphate in the blood. This is often caused by chronic kidney disease. If you/your child joins this study, you will come to 12 visits over about 9 months at Children's Hospital Colorado. At these visits we will ask questions about your health and perform physical exams. We will measure your height, weight, and vital signs. We will also take blood samples using a needle in your arm. We will ask you to fill out surveys about your life and daily habits. Please note, the study drug, ferric citrate, is a pill that you swallow. You will be paid up to $140.00 if you complete all the study visits.

Who can Participate

You/your child may be a good fit for this study if you are between 6 and 17 years old and have been diagnosed with chronic kidney disease by a doctor. Please note, if you are interested in joining this study, our team will check to make sure the study is a good fit for you, and it is safe for you to join.

Study ID