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Test Code BUN Blood Urea Nitrogen (BUN)

Performing Laboratory

Memorial Hospital Laboratory- Automated Procedures  304-388-5953       
General Hospital Laboratory 304-388-6244
Women and Children's Hospital Laboratory 304-388-2385
Teays Valley Hospital Laboratory 304-757-1770
Cancer Center Laboratory 304-388-8317
Plateau Medical Center Laboratory 304-469-8621
Greenbrier Valley Laboratory 304-647-6060
Parkersburg Laboratory 304-865-3679
Beckley Cancer Center Laboratory 304-461-2222

Specimen Requirements

Plasma-Mint Green, Dark Green Lithium Heparin or Serum-SST gold top, red top

Allow SST or red top to completely clot      

Spin and physically separate plasma/serum from contact with cells as soon as possible

4 mL of plasma/serum (minimum 2 mL)

Specimen Rejection

  • Improperly labeled, collected, stored, and transported
  • Quantity not sufficient
  • Hemolyzed 

Storage and Stability

Room temperature 15-25oC 24 hrs
Refrigerated 2-8oC 3 days
Frozen <-20oC 2 months

Reference Values

>18 yrs 7-25 mg/dL
>10-18 yrs 4-18 mg/dL
>2-10 yrs 4-18 mg/dL
>1 month-2 yrs 2-18 mg/dL
0- 1 month 2-14 mg/dL

Methodology

Photometric enzymatic assay

Photometric enzymatic assay Memorial, General, Women and Children's, Teays, Cancer Center, Plateau
Colorimetric Greenbrier, Beckley Cancer Center, Parkersburg  

Days Test Set Up and Turnaround

Monday through Sunday, Continuously

AM Collection Expected by 9AM same day
Routine Expected within 24 hrs
Stat Expected within 1 hr
Timed Expected results are test dependant

CPT Coding

84520