BLOOD UREA NITROGEN

Test Code

BUN

CPT Codes
84520

Preferred Specimen

Gold Tube (SST)

Patient Preparation
None

Minimum Volume

1mL (2mL optimal)

Other Acceptable Specimens

Green Tube (Lithium Heparin)

Instructions

Centrifuge for complete separation of serum or plasma and red cells.

Transport Container

GOLD Tube

Transport Temperature

Room Temperature

Specimen Stability

2-8°C up to 3 days; 15-30°C up to 24 hours

Methodology
Urease, UV

Setup Schedule

Daily, as received

Report Available

STAT: <60 minutes
Routine: <4 hours

Reference Range

Test: BLOOD UREA NITROGEN Male/Female Ages >=0 Days - <5 Days: Normal Range: 7-18 mg/dL Male/Female Ages >=5 Days - <12 Years: Normal Range: 5-18 mg/dL Critical Low : <=0 mg/dL Male/Female Ages >=12 Years - <60 Years: Normal Range: 7-25 mg/dL Critical Low : <=0 mg/dL Male/Female Ages >=60 Years: Normal Range: 8-21 mg/dL Critical Low : <=0 mg/dL
Reference ranges may vary based on performing lab. Use lab reports when interpreting patient results.

Clinical Significance

Used in the diagnosis of certain renal and metabolic diseases; most widely used test for the evaluation of kidney function.

Performing Laboratory
Mount Sinai Hospital
Holy Cross Hospital

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.