PSA, Total Test
A PSA total test measures the total amount of prostate-specific antigen, a protein made by prostate tissue, in the blood. It is used as a screening and monitoring marker, not as a way to diagnose cancer on its own. A clinician interprets the result in context.
About this test
Prostate-specific antigen, or PSA, is a protein produced by the prostate, a small gland that is part of the male reproductive system. Small amounts normally reach the bloodstream, where a lab can measure them.
The test is done with a simple blood draw at a patient service center. A phlebotomist collects a sample from a vein, usually in the arm, and sends it to the laboratory.
Who might consider this test?
- Others use it to follow a marker over time when a clinician has suggested keeping an eye on it.
- Many people talk them through with a clinician before testing
Test details
| Quest code | 5363 |
|---|---|
| Methodology | Immunoassay |
| Sample type | 1 mL serum |
| Collection | Quest patient service center |
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Additional details
What this test looks at
Total PSA reflects activity in the prostate rather than anything about hormone balance. Because the prostate produces this protein, the marker is grouped with prostate-focused testing and is one input a clinician may weigh when discussing prostate health.
PSA is not a hormone, and it is not a picture of the gland. It is simply a protein associated with prostate tissue, which is why the total PSA result is best understood as one data point among several a clinician may consider.
What this test can and can't tell you
A total PSA result cannot diagnose cancer, and it cannot rule it out. It is a screening and monitoring marker, which means it can help a clinician decide whether a closer look is worthwhile, but it does not settle any question on its own.
PSA can be higher for many reasons that have nothing to do with cancer, including benign prostate conditions, recent activity, and certain procedures. It can also sit within an unremarkable range even when something is present. A clinician reads the result against age, symptoms, history, and other findings, and a diagnosis, when needed, involves further evaluation such as imaging and sometimes a biopsy.
How it's often used for monitoring
Because a clinician may be more interested in how PSA changes than in any single reading, the total PSA test is often revisited across more than one point in time. Watching the pattern can add context that a one-time value cannot, especially when someone is already under a clinician's care.
In every use, the marker supports a conversation about whether anything is worth exploring further. It guides next steps; it does not provide conclusions by itself.
Order online and a physician order is included — no doctor's visit and no insurance needed. Your sample is collected at a Quest Diagnostics patient service center.
Laboratory results should always be interpreted by a licensed clinician who knows your health history. This page is information about a test, not medical advice.
Frequently asked questions
What does the PSA total test measure?
It measures the total amount of prostate-specific antigen, a protein made by prostate tissue, in the blood. It reflects prostate activity and is used for screening and monitoring, not for diagnosis on its own.
Can this test tell me whether I have prostate cancer?
No. PSA is a screening and monitoring marker. It cannot diagnose or rule out cancer by itself. A clinician interprets the result alongside age, history, and other findings, and a diagnosis involves further evaluation such as imaging and sometimes a biopsy.
Why can PSA be higher without cancer?
Benign prostate conditions, recent activity, and certain procedures can all influence PSA. This is one reason a clinician reads the result in context rather than treating a single number as an answer.
Why is PSA often measured more than once?
PSA is frequently used for monitoring, so a clinician may focus on how the marker changes over time rather than any single reading. Revisiting it across more than one point can add useful context.
Do I need to prepare for a PSA test?
Certain activities and procedures can affect PSA, so a clinician may offer guidance about timing. It is worth following any instructions provided and mentioning recent procedures and current medications.
How much is a PSA Total test?
$39, paid once at checkout. The price includes the physician's order this test requires and sample collection at a Quest patient service center.