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Blood Urea Nitrogen (BUN), Plasma, Serum, or Urine
Test CodeBUN
Alias/See Also
Urine BUN
Plasma BUN
Serum 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.
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
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