Like "So a 6.6% A1c is certainly "high" for a non-diabetic. But for a newly diagnosed type 1 diabetic 6.6 would be surprisingly low. And if you're truly type 1 and not using insulin, there's no way your highest reading could be under 150. Even if you're eating no carbs at all. It's possible your doctor took a look at your family history and an A1c that's out of the "non-diabetic" range and decided there must be something. It is certainly deserving of more testing and monitoring to see what's going on. One question is what time(s) of day are you testing your blood sugar and seeing the 100 to 150 range? If that's a fasting number, it certainly tells us something different than if you're testing throughout the day and seeing those same numbers."