Test OverviewPrimary screening test given to new patients and annually thereafter.
- New patient.
- Annual physical.
- Patient should not eat or drink anything except water for 8 to 12 hours prior to blood sample collection.
- Sample to lab consists of one refrigerated unopened spun barrier tube.
- Spin sample within 45 minutes of collection; be sure barrier forms a complete separation.
Your doctor or lab may have different instructions that supersede the above.
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Labs Performing Test
Costs cited are subject to change and may be reduced by insurance or cash discounts and increased by sample collection fees.
Urea Nitrogen, Blood (BUN)
Unless specifically noted above, references used in the construction of this web
page include the following:
Lecture notes from Functional Medicine University.
Lecture notes from Southwest College of Naturopathic Medicine.
Lecture notes from the University of Tennessee graduate programs in
Chemistry and Biochemistry.