Urea Nitrogen (BUN)
Main Content
Test Code: 294
CPT Code(s): 84520
Methodology: Spectrophotometry (SP)
Clinical Significance: Urea is the principle waste product of protein catabolism. 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 is caused by stones, tumors, infection, or stricture. Decreased urea levels are less frequent and occur primarily in advanced liver disease and in overhydration.
Additional names: Blood Urea Nitrogen, BUN
Supply: T01 - Red/Gray SST 8.5mL
Preferred Specimen Requirements: Serum
Preferred Volume: 1mL
Container Type: Serum Separator tube (SST)
Transport Temperature: Room Temperature
Specimen Stability: Room Temperature: 7 days
Reject due: Specimens exceeding stability; Unlabeled or improperly labeled specimens; Specimens other than serum
For additional supply or collection device information, please contact DLO's Customer Service at (800) 891-2917, option 2.
The CPT codes provided 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.
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