Cystatin C with Glomerular Filtration Rate, Estimated (eGFR) Blood Test
Compare labs
| Feature |
Labcorp
|
Quest Diagnostics
|
|---|---|---|
| Price | Coming soon | $16.99 |
| Results in | — | ~5 business days |
| Sample type | — | Blood Serum |
| Require fasting | — | No |
About the test
This test measures the level of Cystatin C, a protein found in your body fluids, to assess kidney function. Unlike other markers, the level of Cystatin C's in the blood does not change due to infections, diet, or medication, making it a reliable indicator of how well your kidneys are filtering. The test also estimates your Glomerular Filtration Rate (eGFR), which indicates the rate at which your kidneys are filtering the blood. It's especially useful for people with unusual muscle mass or rapidly changing kidney function.
Who might consider it:
This test is particularly beneficial for individuals with conditions that may affect muscle mass (like quadriplegics, the very elderly, or malnourished individuals) or those experiencing rapid changes in kidney function, such as hospitalized patients.
Included biomarkers & Reference ranges
| Biomarker | Reference range |
|---|---|
| Cystatin C An alternative marker of kidney function that, unlike creatinine, isn't affected by muscle mass — useful for a more precise eGFR estimate. | 0.5–1 mg/L |
| Estimated GFR An estimate of how well your kidneys filter blood, calculated here from cystatin C along with factors such as age and sex. | — |
Reference ranges vary by lab, age, and sex (M/F). Your report shows your exact range. Click any biomarker to see its optimal range and what your results mean.
How it works
- 1. Order online No referral or insurance
- 2. Get a requisition By email in 24–72 hours
- 3. Visit a draw center Bring a matching photo ID
- 4. Get results Securely by email
- These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
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