My BUN and BUN/Creatine Ratio has been “low”, and A/G Ratio “high” for several blood draws. What does this possibly indicate? Doctor dismisses it.

LAb ratios. These ratios are less concerning or clinically important than the actual values that make them up. So, the separate creatine and BUN results are more important than the ratio of BUN/creatinine. Your doctor also has spoken to you and examined you, which is taken into account when making an assessment on someone's health. The best thing is just to ask your doctor to explain the results to you. .