Wow! Dito all. You beat me to it.
Here are some facts and threads you should read. If you are a female of child bearing years.
Some added facts for your Endo that lives in a cave and doesn't follow latest care policies. The American Association of Clinical Endocrinologists!!!! Have changed the TSH normal range three times since under 10 was NORMAL! The last change was SIX years ago in 2002 when the recommended new TSH level be set to 0.3-3.0. This was based on a statistical normal range of 0.89-1.1 for a group study of over 4000 patients with no thyroid dysfunction! Optimal TSH is around 1. If something is up with your AI system or pituitary gland then you look to the FTs. Which for a woman pre meno should be in the 50-80 % range of normal. Post meno 40 - 75%.
Ditch the loser and shop for a new MD. I see an integrative care internal medicine MD for my care. Since January i have recieved treatment for my hashimoto's, identification of thyroid enlargement and nodule, met my ENT for an FNA consultation, been diagnosed with Primary adrenal insufficiency, vit D insufficiency.. my B12 and Ferritin are now normal. Working on final diagnosis of Hashimoto's encephalopathy. All has been done with out an Endo messing things up. Endos can be good.. and they can be bad. It all depends on their area of expertiese and their capacity to follow and keep up with current medical standards.
Another note.. they are considering and looking into adjusting that normal TSH range again.. making it narrower.. 0.35 - 2.5. A thyroid savvy MD would see a TSH greater than 2.5 to be borderline thyroid failure and not shrug it off. They would at least monitor levels every 3 months.