I have Hashimoto and was diagnosed many years ago. Others that I know that have Hashimoto have had good success managing it with medication long-term. I have sometimes went for years taking the same medication and amount and then suddenly, my numbers have changed and I've needed a different amount. I have experienced good care with my local doctor and have not needed to look elsewhere for my thyroid disorder. However, I have been to Mayo Clinic with other health issues. I was well pleased each time I've been to Mayo and highly recommend them for finding answers and solutions.