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

Test Code

BUN

Alias/See Also

Urine BUN
Plasma BUN
Serum BUN

CPT Codes
84520

Preferred Specimen

Submit only 1 of the following specimens: Plasma
Draw blood in a green-top (lithium heparin) tube. Spin specimen down and send 1 mL of plasma.
Note: 1. Indicate plasma.
2. Label specimen appropriately (plasma).
Serum
Draw blood in a plain, red-top tube. Spin specimen down and send 1 mL of serum.
Note: 1. Indicate serum.
2. Label specimen appropriately (serum).
Urine
1 mL from a 24 hour urine collection. No preservative. Follow instructions in Urine Collections in Special Instructions.
Note: 1. Starting and ending times of collection are required.
2. Indicate urine.
3. Label specimen appropriately (urine).
4. Random collection is also acceptable.

Instructions

NMMC-Urine Collections

Transport Temperature

Refrigerate

Methodology
Enzymatic

Setup Schedule

Monday through Sunday

Reference Range

PLASMA OR SERUM

Males

1-7 days: 2-13 mg/dL
8 days - 1 month: 2-16 mg/dL
1-3 months: 2-12 mg/dL
4-6 months: 1-14 mg/dL
7-12 months: 2-14mg/dL
1-3 years: 3-12 mg/dL
4-6 years: 3-16 mg/dL
7-9 years: 4-16 mg/dL
10-12 years: 5-18 mg/dL
13-15 years: 7-18 mg/dL
16-18 years: 5-20 mg/dL
>19 years: 6-20 mg/dL

Females

1-7 days: 2-13 mg/dL
8 days – 1 month: 2-15mg/dL
1-3 months: 2-14 mg/dL
4-6 months: 1-13mg/dL
7-12 months: 1-13mg/dL
1-3 years: 3-14 mg/dL
4-6 years: 4-14 mg/dL
7-9 years: 4-16 mg/dL
10-12 years: 5-16 mg/dL
13-19 years: 4-15 mg/dL
>19 years: 6-20 mg/dL

URINE

2-20 g/24 hour

Performed By
North Mississippi Medical Center Pathology Department

Performing Laboratory
NMMC Pathology Department

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.