Phosphorus (Phosphate)
A blood test that measures phosphate, a mineral the body uses for bones, teeth, nerves and muscles.
Phosphorus (Phosphate)
A blood test that measures phosphate, a mineral the body uses for bones, teeth, nerves and muscles.
Also known as
- Phosphate
- Serum phosphorus
What it measures
- Phosphate level in the blood
Why a doctor may order it
Often used with other tests to help diagnose or monitor kidney disease, bone disorders and parathyroid disorders.
What it helps evaluate
It can help a doctor check how well the kidneys, bones and parathyroid glands are managing minerals.
Preparation
Your provider will tell you how to prepare. Certain medicines, vitamins and supplements can affect accuracy, so tell your provider about everything you take.
Fasting
You may need to fast for several hours before the sample. Your provider or lab will tell you.
Important considerations
- Don't stop medicines unless your provider tells you to.
Discuss results with your doctor
Talk to a doctor about your symptoms and about what your results mean — a single result is not a diagnosis. See a doctor promptly for severe or worsening symptoms.

