Test guide
Calcium Blood Test
A calcium blood test measures the amount of calcium in your blood. Too much or too little calcium in your blood may be a sign of a wide range of medical conditions, such as bone disease , thyroid diseas e, parathyroid disorders , kidney disease , and other conditions.
What it is for
A blood calcium test is used to check your general health. It's also used to help diagnose or monitor many medical conditions, including those that affect your bones, kidneys, digestive system, thyroid, and parathyroid glands. There are two types of calcium blood tests that measure different forms of blood calcium: 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
- total calcium, ionized calcium
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