![]() Please direct any questions regarding coding to the payer being billed. CPT coding is the sole responsibility of the billing party. Normal bun levels during pregnancy typically range from 6 to 20 mg/dl, while normal creatinine levels range from 0.5 to 1.2 mg/dl. Creatinine is a waste product that is produced by muscles and excreted by the kidneys. The CPT codes provided are based on AMA guidelines and are for informational purposes only. It is filtered out of the blood by the kidneys and excreted in the urine. 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. BUN creatinine ratio is just one of the parameters to assess kidneys. A higher than normal BUN level may be a sign that your kidneys are not working well. Increased urea formation also results in an increase in the ratio, e.g. In general, about 7 - 20 mg/dL is a normal level. congestive heart failure or recent onset of urinary tract obstruction, will result in an increase in BUN/Creatinine ratio. Adult: 10-20 mg/dL or 3.6-7.1 mmol/L (SI units) Elderly: May be slightly raised beyond adult levels. 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. A BUN test can help uncover kidney problems at an early stage. Potassium afects how your nerves and muscles are working. People with early kidney disease may not have any symptoms. BUN checks how much urea, a waste product, is in your blood. Higher than normal BUN levels may be a sign that your kidneys arent working well. ![]() Urea nitrogen is a waste product that your kidneys remove from your blood. To calculate the new eGFR from a previous Creatinine or Cystatin C result, go to. The BUN test measures the amount of urea nitrogen in your blood. The eGFR is based on the CKD-EPI 2021 equation. Consulting a doctor for abnormal levels is advisable. However, deviations from this range warrant prompt medical attention. ![]() Typically, levels between 5 Ratio to 15 Ratio suggest no concerns. High BUN Creatinine ratio levels could indicate health issues. Methodology: Photometric Assay, Calculation Your BUN Creatinine ratio level of 23 is a High BUN Creatinine ratio level. 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 Normal values were obtained primarily from the University of Ottawa’s laboratory. Gently invert tube 5 times immediately after draw.Collect and label sample according to standard protocols.Includes: Blood Urea Nitrogen (BUN), Serum Creatinine, BUN/Creatinine Ratio, Estimated Glomerular Filtration Rate (eGFR)Ĭontainer: Gel-barrier tube (SST, Tiger Top)
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