BLOOD UREA NITROGEN, SERUM

Test Code

BUN

CPT Codes
84520

Preferred Specimen

1 Gold tube (gel separator)

Minimum Volume

0.5 mL

Other Acceptable Specimens

or 1 Green tube (Lithium Heparin)

Instructions

Centrifuge for complete separation of plasma/serum and red cells. See Specimen Container for appropriate sample type.

Specimen Stability

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

Methodology

Urease, UV

Setup Schedule

M, T, W, Th, F, Sa, Sun

Reference Range

7 - 25 mg/dL

Clinical Significance

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

Performed By
Alverno Laboratories

Performing Laboratory
Alverno Central Lab
NCHB1 (Chemistry, Beckman AU)

Last Updated: April 25, 2023

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.