# Calcium, Ionized

> This test measures the amount of calcium in your blood that is not attached to proteins, known as ionized calcium. This form of calcium is what your body actively uses for critical tasks like nerve signaling and muscle contraction.

- Labcorp code: 004804
- Category: [Bone Health](https://picardo.health/labs/tests/bone-health.md)
- Sample: blood
- 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=004804&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.