Hello,
Cajunboy has said many good things to you.
I take a more conservative stance based on sources as well. So here you will see that even those in the know have different opinions.
According to Dr. Bernstein's Diabetes Solution normal A1C of a non-diabetic is 4.2-4.6.
That I remember vividly. The average non-diabetic would have FBG below 100 and usually in the range of 70-85.
I believe anything over 5.0 is a warning signal.
I am a T2 diabetic. My last set of A1C's were 5.6, 5.2, 5.6; so you see that the A1C by itself is one indicator, but not enough to say anything one way or another. I keep my A1C in the 5's by diet control, exercise, some meds and now on rare ocassion some basal insulin. I have dropped a lot of weight so that is helping me. From you information, you do not seem to have the weight issue. But....
If I were you I would take it as a warning.
Do start to monitor your BG during the day. You can choose 4 times a day by this schedule:
FBG upon getting up in the morning.
2 hours after breakfast
2 hours after lunch
2 hours after dinner.
A non-diabetic would see an FBG under 100 and readings between 70-90 or so at the 2 hour post priandal readings (after breakfast, lunch and diner).
As a T2 diabetic I look to keep my bg readings under 140. This is the number that most experts will tell you that damage to your organs begin to occur.
A true indicator for you that you HAVE diabetes is if you have a carbohydrate rich meal and about 1 hour later you BG is way up; well above 140 and after 2 hours your BG is still up there above 140.
For example, I love sushi and I have had to give it up. Ocassionally, I will indulge anyhow with my bolus insulin pen ready to counteract the BG surge I wll definitely get. If I just went along and had my sushi and did nothing, my 1 hour BG would be 200+ and this is NO GOOD. Even after 2 hours it would still be up there since a T2 diabetic has lost their phase I insulin response, which you can learn about by buying some material and also searching around on the web.
Here is one good site
http://www.phlaunt.com/lowcarb/
Also, with the current numbers you are indicating most Doctors would ignore it. I am happy to see your Doctor asked for the A1C, but since it is still below 6.0 he/she is not likely to think anything about it. This is the ADA's guidelines or mis-guidelines that are influencing his/her thinking.
Also, buy a book. Educate yourself. There are a few books out there. You should/can educate yourself and be more expert on the topic then the typical Doctor. And buyer beware of Endo's. They are notoriously hooked to the ADA guidelines, which need much improvement.
I bought Dr. Bernsteins' "Diabetes Solution". Now others here may recommend other books. I know there are a few.
Here is the URL for Dr. Bernstein's Book
http://www.diabetes-book.com/
Ok, enough from me. Others may chime in as well.
Ralph