Kidney Health Tests
Kidney Health Tests can be requested without a referral, and this overview covers what to expect. Kidney health tests are blood tests that check how well your kidneys filter waste from your blood. They are often ordered during routine checkups or when a clinician suspects a kidney problem, such as from diabetes, high blood pressure, or certain medications.
- Sample type
- blood
- Category
- Kidney
- Turnaround
- 1-3 business days
- Price
- $59
- Referral
- Not required
Kidney health tests are blood tests that check how well your kidneys filter waste from your blood. They are often ordered during routine checkups or when a clinician suspects a kidney problem, such as from diabetes, high blood pressure, or certain medications.
What it measures
- Creatinine — A waste product from muscle that healthy kidneys remove from blood.
- eGFR (estimated glomerular filtration rate) — A calculated number that estimates how well your kidneys filter.
- Blood urea nitrogen (BUN) — Another waste product that can rise when kidney function drops.
- Electrolytes (sodium, potassium, bicarbonate) — Minerals your kidneys balance; abnormal levels can signal kidney issues.
- Albumin or protein — A blood protein checked to help assess kidney and overall health.
Who it is for
A primary care clinician, nephrologist, or other healthcare provider typically orders these tests. They may be ordered for routine screening, monitoring a chronic condition, or evaluating symptoms like swelling or fatigue.
Preparation
Fasting is usually not required for kidney blood tests, but your clinician may ask you to fast if other tests are done at the same time. Tell your provider about all medications and supplements you take, as some can affect results.
Results and what they mean
Results are reported as numbers with reference ranges, and your clinician interprets them alongside your health history, symptoms, and other tests. A single abnormal value does not always mean kidney disease. This is general information, not medical advice; discuss your results with a qualified healthcare professional.
How to order this test
- Choose the test and place a confidential order online.
- Select a certified collection site and pick a time that suits you.
- Have your specimen collected — most draws take only a few minutes.
- Review results in a secure portal, typically within 1–3 days.
Preparation, hours, and pricing vary by site; confirm details directly with the lab before your visit.
Availability by state
Direct-access online ordering for the kidney health tests is available in most states. It is currently unavailable in 6 states:
Everywhere else you can order confidentially and collect your sample at a certified site. Browse by state →
Frequently asked questions
Do I need to fast for a kidney blood test?
Usually no. Fasting is only needed if your clinician orders other tests that require it.
Can I take my medications before the test?
Ask your clinician. Some medications and supplements can affect kidney test results, so follow their instructions.
How long does it take to get results?
Most kidney blood test results are available within 1 to 3 business days.
What if my results are abnormal?
Your clinician will review them with you and may repeat the test or order additional tests to understand the cause.