What is a phosphate in blood test?A phosphate in blood test measures the amount of phosphate in your blood. Phosphate is an electrically charged particle that contains the mineral phosphorus. Phosphorus works together with the mineral calcium to build strong bones and teeth.Normally, the kidneys filter and remove excess phosphate from the blood. If phosphate levels in your blood are too high or too low, it can be a sign of kidney disease or other serious disorder.Other names: phosphorus test, P, PO4, phosphorus-serum
