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HelpTest Code BUN Blood Urea Nitrogen
EHR Test Codes
| Test Code | Test Name | |
| Atlas | BUN | Blood Urea Nitrogen |
| Cerner | BUN | Blood Urea Nitrogen |
Specimen Requirements
Preparation of Patient:
None
Container Type:
Green Top 5mL Lithium Heparin Separator Tube
Or
Gold Top 6mL SST Gel & Clot Activator Tube
Specimen Type:
Plasma or Serum
Specimen Volume:
2.5 mL Plasma or Serum minimum .5 mL
Specimen Handling/Transport:
Separate plasma or serum from cells within 2 hours of collection.
Transport ambient room temperature.
Specimen Stability/Storage:
5 days refrigerated 2-8°C
Performing Laboratory
Munson Healthcare Laboratories
Chemistry Department
Priority, Frequency, & Turnaround
Priority:
STAT, ASAP, Non-Emergent
Frequency:
24 hours 7 days a week
Turnaround:
0 - 1 days
STAT 45 minute from receipt in lab
Methodology
Urease GLDH
Reporting
Reference Range:
10 - 23 mg/dL
Critical Decision:
≥ 100 mg/dL
Note: Critical values are called to the provider and communicated as critical. Documentation of the call is recorded in the patient record.
Clinical Significance
Urea nitrogen is measured primarily to access kidney function.
CPT Code(s)
84520