Test Code BUN Blood Urea Nitrogen (BUN), Plasma, Serum, or Urine

Additional Codes

Serum/Plasma: LAB140

Random Urine: LAB748 (BUNU)

24 Hour Urine: LAB6547 (URBUN)

Used for renal function evaluation.

St. Mary's Regional Medical Center-Chemistry

CPT: 84520

Submit only 1 of the following specimens:

Plasma

Container/Tube: Light green-top (lithium heparin) tube

Specimen: 1 mL of lithium heparin plasma

Transport Temperature: Ambient

Collection Instructions:

Note: 1. Indicate plasma.
2. Label specimen appropriately (plasma).

Serum

Container/Tube: Plain, red-top tube or serum tube

Specimen: 1 mL of serum

Transport Temperature: Ambient

Collection Instructions:

Note: 1. Indicate serum.
2. Label specimen appropriately (serum).

Urine

Random specimen or Submit an entire 24-hour urine collection in a plastic urine container. No preservative.

Note: 1. Starting and ending times of collection are required.
2. Follow instructions in Urine Collection in Special Instructions.

PLASMA OR SERUM
0-4 days: 3-19 mg/dL
5 days-2 years: 6-17 mg/dL
3-12 years: 8-18 mg/dL
13-18 years: 9-21 mg/dL
>19 years: 7-22 mg/dL

Call criteria (automatic call-back): >80 mg/dL
URINE
7-20 g/24 hour

Monday through Sunday

Available STAT