Maybe you forgot what your question was. The answer was provided by response #2 that can be summarized with one word -- "Yes"
The two responses on here never answered the question. Just a lot of assumptions made instead. I have the same question out of principle because I don't trust doctors. I agree that I have a thyroid problem, but not refilling a medication which can have coma or death as a way of getting your patient into the office to evaluate if they need more, is blackmail. Doctors get paid by SOMEONE, every time you visit them. If you don't have a thyroid, it's not coming back. You may need a higher dose, but you'll wont ever be going lower in dose. There is no step down for life support.
I agree. Demand for thyroid hormones changes over time. I'm sure YOU know how you feel and probably have a pretty good idea whether your meds are appropriately adjusted or not, but your doctor can't get inside your body to see how you feel. So, he has to go by labs and reported symptoms (or lack thereof). He's perfectly within his rights to refuse to refill your script until you have lab work done. In our litigious society, he'd be opening himself up to a malpractice suit by not testing. Until something changes how medicine is practiced...
Why would you not have blood work done to see if you are being under/over medicated.