subclinical hypothyroidism

I'm a 52yo male 6'3" 215 lbs. I have thyroid panels running back to 2009. Since that time I have been testing mostly with TSH in the 3-4.5 range. I might have a blip where I test with 2.5. My primary care insists they are all in the normal range so he is not inclined to treat. My energy levels...

Has anyone tested thyroid hormones using LC/MS-MS instead of immunoassay testing? I read a study about the inaccuracy of the immunoassay when testing levels in the lower part of the range especially for free t3. My most recent free t3 level by immunoassay was 2.5pg/ml range 2.0-4.4pg/ml. With a...