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Home > All Tests > BUN/Creatinine Ratio Blood Test

BUN/Creatinine Ratio Blood Test

Total reviews 422

$45.00 $30.00

Total reviews 422


  • Tests Included: 5

  • Est. 1-3 (business days) Turnaround

  • Specimen type: Blood

  • Quest Diagnostics Location

The BUN/Creatinine ratio is useful in the differential diagnosis of acute or chronic renal disease. Reduced renal perfusion, e.g., congestive heart failure, or recent onset of urinary tract obstruction will result in an increase in BUN/Creatinine ratio. Increased urea formation also results in an increase in the ratio, e.g., gastrointestinal bleeding, trauma, etc. When there is decreased formation of urea as seen in liver disease, there is a decrease in the BUN/Creatinine ratio. In most cases of chronic renal disease the ratio remains relatively normal.

$45.00 $30.00

  • Tests Included: 5

  • Est. 1-3 (business days) Turnaround

  • Specimen type: Blood

  • Quest Diagnostics Location

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BUN/Creatinine Ratio (calculated), Urea Nitrogen (BUN), Creatinine, GFR Estimated

  • Test Code: 296
  • CPT Code: 82565, 84520
  • Alternate Name: BUN, Blood Urea Nitrogen
  • Test Instructions : --

    Please do not exercise prior to testing. It is best that your blood is taken in a rested state.

  • Fasting: No
  • Methodology: N/A
  • Results In: 1-3

    Note: Turn around times on results are an estimate and are not guaranteed. The lab may need additional time due to holidays, confirmation/repeat testing, etc. You can contact us to discuss when your results should be ready and we will contact the lab on your behalf immediately.

Bun/Creatinine Ratio 6-22 (calc)  
Urea Nitrogen (BUN)    
Age Male(mg/dL) Female(mg/dL)
<1 Month 4-12 3-17
1-11 Months 2-13 4-14
1-3 Years 3-12 3-14
4-19 Years 7-20 7-20
≥20 Years 7-25 7-25
Creatinine    
Age Male (mg/dL) Female (mg/dL)
≤2 days 0.79-1.58 0.79-1.58
3-27 days 0.35-1.23 0.35-1.23
1 month-9 years 0.20-0.73 0.20-0.73
10-12 years 0.30-0.78 0.30-0.78
13-15 years 0.40-1.05 0.40-1.00
16-17 years 0.60-1.20 0.50-1.00
18-19 years 0.60-1.26 0.50-1.00
20-49 years 0.60-1.35 0.50-1.10
50-59 years 0.70-1.33 0.50-1.05
60-69 years 0.70-1.25 0.50-0.99
70-79 years 0.70-1.18 0.60-0.93
≥80 years 0.70-1.11 0.60-0.88

For patients >49 years of age, the upper reference limit for creatinine is approximately 13% higher for people identified as African-American.

eGFR Non-African American ≥60 mL/min/1.73m2
eGFR African American ≥60 mL/min/1.73m2

$45.00 $30.00

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