# Cystatin C With Glomerular Filtration Rate, Estimated (eGFR)

> This test measures the level of cystatin C, a protein produced by your cells, to calculate your estimated glomerular filtration rate (eGFR). Because cystatin C levels are not affected by muscle mass, this test helps evaluate kidney function more accurately in people where standard creatinine tests might be misleading.

- Labcorp code: 121265
- Category: [Heart & Metabolic](https://picardo.health/labs/tests/heart-metabolic.md)
- Sample: blood
- Labcorp turnaround: 2–5 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=121265&ref=assistant

## Results reported (2)

- Cystatin C
- eGFR

## 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.