BUN (Urea Nitrogen), 24-Hour Urine

CPT Code(s):

  • 84540

Preferred Specimen:

10 mL urine aliquot from a 24-hour collection. No preservative

Special Instructions:

Record total 24-hour urine volume on the request form

Transport Container:

Plastic urine container, no preservative

Transport Temperature Name:

Room temperature

Specimen Stability Components:

  • Room Temperature: 3-5 days
  • Refrigerated: 7 days

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