Why do I need a phosphate in blood test?You may need this test if you have symptoms of kidney disease or a parathyroid disorder. These include:FatigueMuscle crampsBone painBut many people with these disorders don't have symptoms. So your provider may order a phosphate test if he or she thinks you may have kidney disease based on your health history and the results of calcium tests. Calcium and phosphate work together, so problems with calcium levels can mean problems with phosphate levels as well. Calcium testing is often part of a routine checkup.
