Please direct any questions regarding coding to the payer being billed. CPT coding is the sole responsibility of the billing party. The CPT codes provided are based on AMA guidelines and are for informational purposes only. In most cases of chronic renal disease, the ratio remains relatively normal. When there is decreased formation of urea, as seen in liver disease, there is a decrease in the BUN/Creatinine ratio. Increased urea formation also results in an increase in the ratio, e.g.

congestive heart failure or recent onset of urinary tract obstruction, will result in an increase in BUN/Creatinine ratio. Please Note: If results for BUN and Creatinine are both within the normal reference range, the BUN/Creatinine ratio will not be reported (not applicable).Ĭlinical Significance: The BUN/Creatinine ratio is useful in the differential diagnosis of acute or chronic renal disease. For the adult male, the normal range is 0.6 to 1.2 mg/dl, or 53 to 106 mol/L by the kinetic or enzymatic method, and 0.8 to 1.5 mg/dl, or 70 to 133 mol/L. To calculate the new eGFR from a previous Creatinine or Cystatin C result, go to. The eGFR is based on the CKD-EPI 2021 equation. Methodology: Photometric Assay, Calculation 0.7 mL (Note: This volume does not allow for repeat testing.). Transport: Store serum at 2☌ to 8☌ after collection and ship the same day per packaging instructions included with the provided shipping box.Ĭauses for Rejection: Specimens other than serum improper labeling samples not stored properly samples older than stability limits When your kidneys are not working well, your BUN level goes up. Healthy kidneys take urea nitrogen out of your blood. Urea nitrogen is a waste product that your body makes after it breaks down protein. Gently invert tube 5 times immediately after draw. What is BUN Your blood urea nitrogen (BUN) level is based on a blood test that measures the amount of urea nitrogen in your blood.Collect and label sample according to standard protocols. The American Board for Internal Medicine lists the typical reference range for blood urea nitrogen as 7 to 20 mg/dL.Includes: Blood Urea Nitrogen (BUN), Serum Creatinine, BUN/Creatinine Ratio, Estimated Glomerular Filtration Rate (eGFR)Ĭontainer: Gel-barrier tube (SST, Tiger Top)

Bun normal range mgdl