# 5‐HIAA, Plasma

> This test measures 5-HIAA in your blood, a waste product created when the body breaks down the hormone serotonin. It helps show whether symptoms like flushing, diarrhea, or wheezing are caused by tumors that release too much of this hormone.

- Labcorp code: 504510
- Category: [Cancer Detection](https://picardo.health/labs/tests/cancer-detection.md)
- Sample: blood
- Labcorp turnaround: 8–15 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=504510&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.