Test Overview
Test Methodology

Rate (Urease)

Test Usage

Renal function test, evaluate protein metabolism.

Reference Range *

1-11 years: 5 - 20 mg/dL (0.8-3.3 mmol/L), 12-150 years: 8 - 20 mg/dL (1.3-3.3 mmol/L).

Test Details
Days Set Up
Daily, 24 hours
Analytic Time

2 hours

Soft Order Code
UN
MiChart Code
Urea Nitrogen (BUN)
Synonyms
  • BUN
  • UN
  • Urea, Serum
  • UREA NITROGEN
  • UNPR
  • Urea Nitrogen, Pre-dialysis
  • UNPO
  • Urea Nitrogen, Post-dialysis
Laboratory
Chemical Pathology
Section
Automation
STAT Availability

STAT requests for this test will be performed on a STAT basis (supervisory staff approval is not required).

Specimen Requirements
Collection Instructions

Collect specimen in SST tube. Centrifuge, aliquot serum into a plastic container and refrigerate.

Alternate Specimen
Red top, Green top (sodium or lithium heparin) tube.
Normal Volume
0.5 mL serum
Minimum Volume
0.25 mL serum
Billing
CPT Code
84520
Fee Code
20503
LOINC
3094-0
NY State Approved
No