Hi,
There is a difference and a doctor should tell you the difference. But you are also hyperthyroid with Graves. Other forms are caused by other things, Graves by antibodies attacking the thyroid.
I went to the Mayo Clinic in Rochester Mn. They DO take insurance. I was quite satisfied with my treatment and the way they courteously answered my questions. What was really nice was getting it all taken care of in 2 days, instead of weeks back and forth to the doctor. I had all my tests done one day and the treatment the next day.
Of course, i had known that i probably had Graves before i went there and had pretty much made up my mind to go the RAI route.
Hope this helps you.
Virginia In Mn