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Cystatin C with Glomerular Filtration Rate, Estimated (eGFR)

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A Cystatin C Blood Test is used to screen for and monitor kidney dysfunction in those with known or suspected kidney disease.

  • Sample Type: Blood
  • Results: 2-7 days
  • Age: 18+

The Cystatin C with estimated Glomerular Filtration Rate (eGFR) test is a blood test used to assess kidney function. It measures the level of cystatin C, a small protein produced by all nucleated cells in the body, including the kidneys. The eGFR is calculated using the cystatin C level, along with other factors like age, gender, and race, to estimate the rate at which the kidneys are filtering waste products from the blood. This test is considered to be a more sensitive marker of kidney function compared to the traditional creatinine-based eGFR, especially in individuals with certain health conditions or those who may have muscle mass variations.

Fasting for 10-12 hours required.

Quest test codes: 94588

$41

+$15 service fee

Price does not include the Physician Service Fee ($6) and the Lab Collection Fee ($9). These non-refundable fees cover the ordering and oversight of lab tests and follow-up services when appropriate.

Next availability

Provided by Quest Diagnostics

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4.7 rating

How does it work?

  • Order Tests Online

    No doctor visit required for purchase. Choose from a wide range of panels and tests. Pay online with a credit or debit card — no insurance needed.
  • Go to the Lab for Sample Collection

    Complete your test sample collection during your scheduled appointment.
  • Get Fast Results Online

    We will email you when your results are ready. Access your Confidential Lab Record by logging in to your account. There you can view, save and print your results.

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Lab Tests FAQs

No. At Tripment Health, we focus on providing transparent healthcare services to uninsured or under-insured individuals. We’ve negotiated prices directly with lab test facilities to make diagnostic lab panels available to individuals who would rather pay directly than go through a private or government-sponsored insurance carrier.

No. By purchasing a blood panel, you will not be able to submit any claim, bill, or other request for reimbursement to any insurer, third-party payer, or government health program. However, you can use your FSA and HSA card. 

You will receive a payment confirmation email, then an additional email confirming your appointment details (time and location of appointment, and QR code). You will need to present your QR code at the testing facility to check in.

No. One of our physicians will order the panels for you.

You must be 18 or over to be able to get tested.