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Test Code BUN Blood Urea Nitrogen (BUN), Serum


Necessary Information


Patient's age and sex are required.



Specimen Required


Collection Container/Tube:

Preferred: Serum gel

Acceptable: Red top

Submission Container/Tube: Plastic vial

Specimen Volume: 0.5 mL

Collection Instructions:

1. Serum gel tubes should be centrifuged within 2 hours of collection.

2. Red-top tubes should be centrifuged, and the serum aliquoted into a plastic vial within 2 hours of collection.


Useful For

Screening test for evaluation of kidney function

Method Name

Photometric/Urease

Reporting Name

Bld Urea Nitrog (BUN), S

Specimen Type

Serum

Specimen Minimum Volume

See Specimen Required

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Refrigerated (preferred) 7 days
  Frozen  365 days

Reject Due To

Gross hemolysis OK

Reference Values

Males

1-17 years: 7-20 mg/dL

≥18 years: 8-24 mg/dL

Reference values have not been established for patients who are <12 months of age.

 

Females

1-17 years: 7-20 mg/dL

≥18 years: 6-21 mg/dL

Reference values have not been established for patients who are <12 months of age.

Day(s) Performed

Monday through Sunday

Report Available

Same day/1 to 2 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

CPT Code Information

84520

LOINC Code Information

Test ID Test Order Name Order LOINC Value
BUN Bld Urea Nitrog (BUN), S 3094-0

 

Result ID Test Result Name Result LOINC Value
BUN Bld Urea Nitrog (BUN), S 3094-0

Forms

If not ordering electronically, complete, print, and send a Renal Diagnostics Test Request (T830) with the specimen.