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kidney testing bun/creatinine ratio is high?

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i recently had some blood work done and everything looks really good. however after looking a the lab results myself i noticed my bun/creatinine ratio is high, it is 27 and should be in the range of 9-23. my bun number is 18 (normal is 6-24) and my creatinine is 0.66 (normal is 0.57-1.00). this is the one test i was wanting to see because i have had 3 or 4 kidney stones over the past 5 year...all assumed passed...the last one i believe i had i did not see the doctor for...just on my mind and wanted my kidney function checked. my questions:
1. is the bun/creatinine ratio of 27 something that i should worry about
2. is there anything else i should do to check that my kidneys are working ok.
thank you for your help!
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replied March 26th, 2011
Hello and thank you for posting your health query on E health Forum.

From the history provided, your kidney functions are absolutely normal. The slight increase in the BUN / creatinine ratio is not something to be worried about.

There is no need for any further investigations at this moment.

Your kidneys functions are normal.

I hope this helps

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replied December 18th, 2013
My wifeI just received her lab test and it shows:
BUN/Creatinine: Ratio 27 normal 9 - 23
LDL cholesterol calc: 108 normal 0 - 99
Vitamin B12: 1,464 normal 211 - 946
Hemoglobin Alc: 5.8 normal 4.8 - 5.6
Vitamin D, 25-Hydroxy: 24.6 normal 30 - 100
Is there something that she has to worry about?
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