# Cancer Antigen (CA) 27.29 (Serial Monitor)

> This test measures the level of CA 27.29, a protein often released into the bloodstream by breast cancer cells. It is primarily used to monitor patients currently undergoing treatment for breast cancer to determine if the therapy is working or if the disease is returning.

- Labcorp code: 480293
- Category: [Cancer Detection](https://picardo.health/labs/tests/cancer-detection.md)
- Labcorp turnaround: 1–2 days
- Collection: free at a Labcorp location, or $75.00 at home.
- Without a doctor: yes. People order it themselves, with no doctor's visit or referral.
- Price: shown on the review page its order link opens. Opening it orders nothing.
- Order link: https://app.picardo.health/labs/order?tests=480293&ref=assistant

## About ordering

People order for themselves, with no doctor's visit or referral, and results arrive in their 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.