Urea Nitrogen (BUN)

Supply #193262 Red/Gray SST 8.5mL

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

Collection Guide: 

Supply: #193262 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.