# Phosphorus, 24-Hour Urine

> This test measures the total amount of phosphorus released in your urine over a full 24-hour period. It helps show how well your kidneys are regulating minerals and maintaining the balance between calcium and phosphorus needed for healthy bones. Doctors use these results to investigate the cause of kidney stones or to check for issues with the parathyroid glands and vitamin D levels. However, this test does not provide a standalone diagnosis, as high or low levels can sometimes simply reflect changes in your diet.

- Labcorp code: 003251
- Category: [Bone Health](https://app.picardo.health/labs/tests/bone-health.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=003251&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.