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Blood Urea Nitrogen (BUN) Test

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Abnormal blood urea nitrogen (BUN) levels can indicate an issue with the liver or kidneys.

This test is a common component of a routine health screening, and is also used to evaluate kidney and liver function. 

Urea is produced by the liver as it breaks down proteins. From there, it is filtered by the kidneys and exits the body through urine. In conjunction with a creatinine test, a BUN test can be used to evaluate kidney disease. This test is also included in the Basic Metabolic Panel, Comprehensive Metabolic Panel, and Renal Function Panel. There are no fasting requirements for this test.

Quest test codes: 294

$3

+$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.

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Provided by Quest Diagnostics
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Frequently asked questions

The Blood Urea Nitrogen (BUN) Test works by collecting a blood sample and measuring levels of BUN. Abnormally high levels generally point to problems with your kidneys. 

Your provider may order a blood test for candida antibodies to diagnose the overproduction of candida caused by either the disruption of healthy bacteria or a compromised immune system. Some factors may include pregnancy, antibiotic use, birth control pills, diabetes, immunosuppression, or HIV infection. 

Your provider may wish to order a Blood Urea Nitrogen (BUN) Test if you’re exhibiting symptoms of kidney disease, such as:  

  • Urinating more or less
  • Nausea or vomiting 
  • Loss of appetite
  • Muscle cramps

You cannot take a Blood Urea Nitrogen (BUN) Test at home — this test can only be administered by a medical professional at a licensed testing facility. 

Once you receive the results of your blood test for Blood Urea Nitrogen (BUN), you will need to consult with your provider. Only a medical professional can advise you on your BUN levels and help you develop a treatment plan if necessary. 

Your BUN levels may fluctuate over time, depending on a variety of factors that could impact your liver or kidney function. A blood test for BUN can help monitor these changes over time. 

There are no special requirements for the Blood Urea Nitrogen (BUN) Test. Your provider will draw a blood sample from a vein in your arm. Blood Urea Nitrogen (BUN) Test results typically only take 1-2 business days to process. 

The cost of a Blood Urea Nitrogen (BUN) Test listed on Tripment Health is transparent and final — you will never be asked to pay additional fees at the testing facility, or receive a surprise bill down the road. 

Tripment Health has partnered with nearly 7,000 lab test facilities across 48 states. Finding a Blood Urea Nitrogen (BUN) Test, current procedural technology (cpt) code 294, is easier than ever. Add the lab tests you need to your cart, then select a testing facility conveniently close to you.