Test
PSA blood test
Also known as: prostate specific antigen, PSA
A PSA blood test measures prostate-specific antigen. It is used in discussions about prostate health, but a single value cannot diagnose or exclude cancer on its own.
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- Urology Hospitals Editorial Team
- Last updated
Independent clinical review pending. This page is written by our editorial team from the cited authoritative sources and has not yet been checked by an independent qualified clinician. Always discuss your situation with your own healthcare professional.
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What it can help assess
PSA may be part of discussions about prostate health, symptoms, or follow-up. A result outside a reference range is a prompt for discussion, not a diagnosis.
What can affect results
Several non-cancer factors can change PSA, including some conditions and recent activities. Tell the clinician about relevant history.
Understanding results
Interpretation depends on the individual and context. A clinician can explain what a value means for you and whether any further steps are reasonable.
Questions to ask a clinician
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Sources
Prostate-Specific Antigen (PSA) Test(opens in a new tab)
National Cancer Institute · Accessed Jul 18, 2026