# Prostate-specific Antigen (PSA), Ultrasensitive (Serial Monitor)

> This test measures extremely low levels of prostate-specific antigen (PSA), a protein produced by the prostate gland. It is primarily used to monitor men after prostate cancer treatment to see if PSA levels remain undetectable or are beginning to rise. Tracking these minute changes helps doctors identify if cancer cells may be returning before they would appear on a standard test. However, a rising level alone does not locate the cancer or confirm a specific diagnosis without further medical evaluation.

- Labcorp code: 140723
- Category: [Cancer Detection](https://app.picardo.health/labs/tests/cancer-detection.md)
- Price: shown at checkout, before payment.
- Blood draw: free at a Labcorp location, or $75.00 at home.
- Order link: https://app.picardo.health/labs/order?tests=140723&ref=assistant

## About ordering

A licensed physician reviews every order before any test is run, and results arrive in the person's Picardo account. Ordering is open to adults 18 and over in the US, except New York, New Jersey, Rhode Island, Pennsylvania, Maryland, Massachusetts, Hawaii and Maine. General health information, not medical advice.