What's this test for?

This test is ideal if you're concerned about your kidney health, have diabetes or high blood pressure, experience persistent swelling or changes in urination, or want to assess your hydration status. It helps detect early kidney problems before symptoms become severe and monitors how well your kidneys are filtering waste from your blood. Many people use this test as part of routine health screening or when taking medications that may affect kidney function.

What happens after I get my results?

You'll receive detailed doctor notes in simple language explaining what your creatinine and eGFR levels mean for your kidney function and overall health. These notes include personalized recommendations like hydration tips, dietary adjustments, or whether you should monitor kidney function more closely. You'll also get the standard lab report and can track your kidney function over time using our trends feature to see if lifestyle changes or treatments are working.

What's included in this test?

This panel measures Creatinine and eGFR (estimated glomerular filtration rate). Creatinine shows how much waste product is in your blood, while eGFR indicates how efficiently your kidneys are filtering waste. Together, these measurements provide an accurate picture of your kidney function and can detect problems early, even before you experience symptoms.

How should I prepare for this test?

Avoid taking antibiotics containing cephalosporin for at least four hours before your test, as they can cause falsely elevated creatinine results. Otherwise, no special preparation is typically needed. Stay normally hydrated and continue your regular medications unless instructed otherwise by your healthcare provider.

Who should consider getting this test?

This test is important for people with diabetes or high blood pressure, as these conditions can damage kidneys over time. It's also valuable for anyone taking medications that affect kidney function, those with a family history of kidney disease, older adults, and people experiencing symptoms like swelling, fatigue, or changes in urination patterns.

What symptoms indicate I may need this test?

Common signs of kidney problems include persistent swelling in your legs, ankles, or face, changes in how often you urinate or the color of your urine, unexplained fatigue or weakness, and difficulty concentrating. You might also experience nausea, poor appetite, or muscle cramps, though early kidney problems often have no symptoms at all, which is why screening is important.

How can I naturally support my kidney health?

Supporting kidney function starts with staying well-hydrated by drinking adequate water throughout the day. Maintain a balanced diet low in processed foods and sodium, and limit protein intake if advised by your doctor. Regular exercise, maintaining healthy blood pressure and blood sugar levels, avoiding excessive use of over-the-counter pain medications, and not smoking all help protect your kidneys.

What does high creatinine mean?

High creatinine levels suggest your kidneys aren't filtering waste as efficiently as they should. This can happen due to kidney disease, dehydration, urinary tract obstruction, reduced blood flow to the kidneys from conditions like heart failure or shock, or muscle breakdown from intense exercise or injury. Your doctor will consider your eGFR and other factors to determine the cause.

What does low creatinine mean?

Low creatinine is less common and may indicate decreased muscle mass from aging, malnutrition, or muscle-wasting conditions. In some cases of severe liver disease, your body may produce less creatinine. Low creatinine alone is rarely a concern, but your doctor will interpret it in the context of your overall health and muscle mass.

How often should I retest my kidney function?

If you have normal kidney function and no risk factors, testing every 1-2 years as part of routine wellness screening is reasonable. People with diabetes, high blood pressure, or early kidney disease should test every 3-6 months to monitor changes. If you're on medications that affect the kidneys or have declining kidney function, your doctor may recommend more frequent testing every 1-3 months.

Getting your blood test with us is easy, private & backed by the power of science.Long story short: In the test options, use the filters or search box to narrow your choices and find the test you want. If you need a hand navigating through options, text our super friendly support team at 754-799-7833, and we'll provide tailored suggestions to help you find the ideal test. Once your order is placed, we’ll create your doctor’s lab order remotely, without any need for you to make a trip to a doctor in person or to talk to the doctor. Expect to receive your doctor’s lab order right in your inbox. It will also be in your patient portal if you need to find it later. We’ll also include instructions regarding fasting and other requirements for your test. Your patient portal will be auto-created hassle-free during checkout. If this is your first time ordering, you'll be prompted to create a password for instant login access to your patient portal. It's a quick way to conveniently access your orders and results whenever you want. When you’re ready, visit one of our 4,000 locations. Just bring your ID – no printing or faxing of your lab order is needed, as your order and details will already be in the lab system. Note that most lab locations don’t accept walk-ins, so it’s best to book an appointment in advance. Don’t worry – we’ll provide detailed instructions along the way. You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy! If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com and we'll gladly help you.

How do I know which test to get?

In the test options, find the test you want. If you’re not sure which test to get, we can lend a hand in finding the right option. Just text or call us at 754-799-7833, email us at support@privatemdlabs.com, and we'll gladly help you. We've got your back and reply quickly.

When will my lab results be available?

Most test results will be available within 1–3 business days. Once they're ready, we'll send an email and text message to let you know. After your blood draw, just hang tight and don't worry – we'll keep you updated and in the loop! If you have any further questions, please text us at 754-799-7833 or email support@privatemdlabs.com, and we'll gladly help you.

Is it possible to make changes to my lab order if I made a mistake with the name, date of birth, or any other details?

Absolutely! We totally understand that errors can happen. No worries, we're here to help you. Just reach out to us via text at 754-799-7833 or shoot us an email at support@privatemdlabs.com. Remember to include your order number and let us know the correct information you’d like to update. Our awesome team will jump right in and make sure everything is sorted out and accurate for you. There are no changes necessary if your address is wrong on the requisition though. We don’t mail anything out. Our lab requires an address to be listed to generate an order.

Do you accept health insurance?

Only HSA & FSA is accepted. Our services are strictly self-pay and cannot be submitted to your health insurance provider except for Health Savings Accounts or Flexible Savings Accounts. This policy applies to all insurance companies, including federal health insurance programs like Medicare. If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com.

Can I cancel my order?

Yes. We get it – sometimes your needs change. As long as your samples haven’t been collected yet, we’re happy to help you cancel your order. If you have any further questions, please text us at 754-799-7833 or email support@privatemdlabs.com. You can read more about our cancellation policy here.

How can I find a lab location near me?

During the ordering process, you’ll be able to select a specific lab near you, with no strings attached! You can switch it up later easily and visit any of our authorized locations as long as it’s the same lab company you selected your test for (Quest Diagnostics or Labcorp). Before you proceed with your order, feel free to browse through all our lab locations here. This will give you the peace of mind of knowing that there's a lab nearby your home, office or your favorite gym. If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com and we'll gladly help you.

Kidney Function Test - Creatinine & eGFR Check

Getting your blood test with us is easy, private & backed by the power of science.

Long story short:

In the test options, use the filters or search box to narrow your choices and find the test you want.
If you need a hand navigating through options, text our super friendly support team at 754-799-7833, and we'll provide tailored suggestions to help you find the ideal test.
Once your order is placed, we’ll create your doctor’s lab order remotely, without any need for you to make a trip to a doctor in person or to talk to the doctor. Expect to receive your doctor’s lab order right in your inbox. It will also be in your patient portal if you need to find it later. We’ll also include instructions regarding fasting and other requirements for your test. Your patient portal will be auto-created hassle-free during checkout.
If this is your first time ordering, you'll be prompted to create a password for instant login access to your patient portal. It's a quick way to conveniently access your orders and results whenever you want.
When you’re ready, visit one of our 4,000 locations. Just bring your ID – no printing or faxing of your lab order is needed, as your order and details will already be in the lab system.
Note that most lab locations don’t accept walk-ins, so it’s best to book an appointment in advance. Don’t worry – we’ll provide detailed instructions along the way.
You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy!

754-799-7833

[email protected]

Blood Test for Kidney Function and Dehydration

Creatinine, Serum

90 day happiness guarantee

Prescription & fees included

Easy to understand results

Fast & convenient

90 day happiness guarantee

Prescription & fees included

Easy to understand results

Fast & convenient

What's this test for?

How should I prepare for this test?

What's included in this test?

Here’s why 1,000,000+ customers chose us for affordable hassle-free private blood testing.

Blood Test for Kidney Function and Dehydration

90 day happiness guarantee

Prescription & fees included

Easy to understand results

Fast & convenient

1,000,000+ blood tests later, here's what our customers say