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Specimen Collection Manual and Test Catalog

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BUN

Geisinger Epic Procedure Code:  LAB1889    Geisinger Epic ID:  14443

SPECIMEN COLLECTION
Specimen type: 

Plasma or Serum


Preferred collection container: 
Specimen required: 

2 mL of serum or plasma; minimum 0.2 mL.



SPECIMEN PROCESSING
Processing instructions: 

Allow serum to clot. Centrifuge to separate serum or plasma within 2 hours of collection.


Transport temperature: 

Refrigerated (preferred). Room temperature or frozen specimen also acceptable.


Specimen stability: 

Room temperature: 7 days. Refrigerated: 7 days. Frozen: 1 year.


Rejection criteria: 

Stability limits exceeded.



TEST DETAILS
Reference interval: 

6-20 mg/dL.


CPT code(s):  84520
Note: The billing party has sole responsibility for CPT coding.  Any questions regarding coding should be directed to the payer being billed.
The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only.

Test includes: 

Blood urea nitrogen (BUN).


Methodology: 
Spectrophotometric (Colorimetric)
Synonyms: 

Urea, Urea Nitrogen, Blood Urea Nitrogen, BUN


Clinical significance: 

A breakdown product of protein, used in the diagnosis and treatment of certain renal and metabolic diseases.


Doctoral Director(s): 
Hoi-Ying Elsie Yu, PhD, DABCC, FADLM
Sheng-Ying (Margaret) Lo, PhD, DABCC
Review Date:  12/27/2024

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