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What is a BUN (Blood Urea Nitrogen) Test? A BUN, or blood urea nitrogen test, measures the amount of urea nitrogen in your blood. Urea nitrogen is a waste product that forms as your body breaks down proteins. It's carried in your blood and then removed by your kidneys when you urinate (pee). Having a small amount of urea nitrogen in your blood is normal. But higher-than-normal BUN levels may be a... https://medlineplus.gov/lab-tests/bun-blood-urea-nitrogen
MedlinePlus matched the above information to LOINC® 3094-0. LOINC stands for Logical Observation Identifiers Names and Codes.
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