# Cancer Antigen (CA) 125 (Serial Monitor)

> This test measures the amount of CA 125, a protein often released into the blood by ovarian cancer cells. Doctors primarily use this test to track how well cancer treatment is working or to check if the cancer has returned after therapy. Monitoring changes in these levels helps show whether the disease is stable or progressing. However, this test cannot diagnose cancer by itself, as other non-cancerous conditions can also cause high levels.

- Labcorp code: 480061
- 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=480061&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.