Hi, I’m 5’10, 165 lb, and I’m a 27 year old male. No high blood pressure and no diabetes. My creatinine is between 1.3-1.6 over several blood tests. I was referred to a specialist and after an ultrasound of my kidneys he said my creatinine levels are fine and that some people naturally fall out of the normal ranges and that I don’t have any kidney damage whatsoever. Is this accurate, or should I get a second opinion?

Yes. There are very muscular individuals with a larger muscle mass that may have elevated serum creatinine. This also occurs rarely in normal individuals. I would also recommend that you have urine testing for blood, protein and infection, just to make sure that this is normal for you.