It's not that simple. There is a difference between people like me (with pre-diabetes) and those with full diabetes
Not to mince words but it is that simple.
The definition of Diabetes is simply "one single measurement of blood glucose greater than 126.
Below 126 you may have "impaired glucose tolerance" but you do not have diabetes. The American diabetic association likes to call impaired glucose tolerance "pre diabetes" because it is useful in teaching and an easier term than impaired glucose tolerance to understand. It is also useful in scaring people into understanding that they are about to have a disease that is deadly. Pre diabetes is not an accepted medical diagnosis. The chart below is from the ADA website. The area they call "prediabetes" is associated with an elevation above normal during a glucose tolerance test and should be a warning to change your lifestyle as you appear to have done.
You will note the area above 126 is clearly labelled "Diabetes"
It took me 3 months to get my A1C within normal limits with diet and exercise.
I am a bit confused as Hemoglobin A1C to my knowledge does not rise above what is accepted as normal until you have been"diabetic" for at least 3 months.
Also it would be unusual for a physician to treat elevated blood sugar with any kind of medication before a diagnosis of diabetes is made.
From what you wrote above it appears to me that you are at significant risk of having "Type II" (adult onset) diabetes or already have it.
The good is that you took your Drs. warning seriously and did something about it that will prevent the ravages and devastation of longterm untreated diabetes. Unlike the poster above who disbelieved his test and in all liklihood is doing nothing in the belief that there is no problem.
Herein lies my and most physicians problem and dislike for terms like near diabetes, pre-diabetes, lite diabetes, almost diabetes, mild diabetes. They all connote a less than serious problem and often result in no treatment. It is my and most physicians practice to inform any patient witha glucose of greater than 126 that they have diabetes and treat it. Those with glucose in the range that the ADA calls pre diabetes we inform the patients that if they do not drastically change their ways they will become diabetics.
To write the word pre diabetes on a patient record, while not an acceptable medical diagnosis, will absolutely destroy their chances of getting medical insurance should they ever change employers.
Now I will grant you that "diabetes is not that simple" There are 2 forms of diabetes the cause of which and treatment for are grossly different as is the course of the disease. The end result however is the same if it is not treated promptly and aggressively especially if lack of treatment is caused by using trivializing terms such as pre or near diabetes.
You are a diabetic or you are not and if you are the possibility of not flying is a trivial problem compared to what lies ahead if you do not take it seriously.
Below is a link to the ADA website. In it they explain why "they" (the American Diabetic Association) coined the term pre diabetes.
This website is an excellent source of info about diabetes and if you are aman, sedentary and significantly over weight you would do well to read it.
American Diabetic Association