BLOOD UREA NITROGEN

Test Code

BUN

CPT Codes
84520

Preferred Specimen

PLASMA

Transport Container

MINT GREEN

Transport Temperature

REF-5 DAYS

Setup Schedule

Set Up:
Report Available:

Reference Range

BLOOD UREA NITROGEN

mg/dL

0Y 00M F 8-20 0Y 00M M 8-20

Clinical Significance

Urea is the principle waste product of protein catabolism. It is synthesized in the liver from ammonia which is produced as a result of the deamination of amino acids and is excreted by the kidneys. BUN is most commonly measured in the diagnosis and treatment of certain renal and metabolic diseases. Increased BUN concentration may result from increased production of urea due to (1) diet or excessive destruction of cellular proteins as occurs in massive infection and fevers, (2) reduced renal perfusion resulting from dehydration or heart failure, (3) nearly all types of kidney disease, and (4) mechanical obstruction to urine excretion such as caused by stones, tumors, infection, or stricture. Decreased urea levels are less frequent and occur primarily in advanced liver disease and in over hydration

Performing Laboratory
LMH - Chemistry x3739 or 3764

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.