Test guide
Phosphate in Blood
A phosphate in blood test measures the amount of phosphate in a sample of your blood. Phosphate contains the mineral phosphorus. So, a phosphate test is sometimes called a phosphorus test.
What it is for
A phosphate in blood test is often used with other tests to help diagnose and/or monitor: A phosphate test may also be used to monitor people who: Source: MedlinePlus, National Library of Medicine. Medical test information is public domain. Source identity and definition checked automatically on 2026-10-18. No individual clinical interpretation or human reviewer is asserted.
Limitations
Reference intervals and interpretation depend on the laboratory, specimen, method and clinical context. This source definition is educational information; it does not establish a diagnosis, product approval or suitability for an individual.
Also known as
- phosphorus test, P, PO4, phosphorus-serum, phosphate, inorganic phosphorus
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