Blood Urea Nitrogen (BUN) CPT: 84520
Blood Urea Nitrogen
Expected Turnaround Time
Within 1 day
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Serum (preferred) or plasma
Gel-barrier tube, green-top (lithium heparin) tube, or lavender-top (EDTA) tube; do not use ammonia heparin tube.
Separate serum or plasma from cells within 45 minutes of collection.
To evaluate the health of your kidneys; to help diagnose kidney disease; to monitor the effectiveness of dialysis and other treatments related to kidney disease or damage.
As part of a routine comprehensive or basic metabolic panel (CMP or BMP) during a health exam; when you have signs and symptoms that may be due to kidney disease or you have a condition that may cause or be worsened by kidney dysfunction; at regular intervals when you are being treated for kidney disease or damage.
A blood sample drawn from a vein.