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Urea Nitrogen, Blood

Test Code
BUN


Alias/See Also
BUN, Blood Urea Nitrogen,


CPT Codes
84520

Preferred Specimen
Light GREEN (PST)


Other Acceptable Specimens
Serum (Red) or Gold (SST) or Orange (OJ) or Tiger Top Serum


Instructions
No hemolysis.


Specimen Stability

Serum/Plasma: If the analysis is delayed more than 24 hours, refrigerate at 2 - 8o C for up to several days. Samples may be frozen at < -20o C for 2 to 3 months.




Setup Schedule
24x7


Report Available
< 1 day


Reference Range
< 2 years of age:  5-15 mg/dL
> 2 years of age:  6-20 mg/dL
 


Clinical Significance

Urea Nitrogen (BUN):  Measurement of urea nitrogen is used in the diagnosis and treatment of certain renal and metabolic diseases.




Performing Laboratory
CRMC Laboratory
CCMC Laboratory
CCI Laboratory
FHSH Laboratory



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.