I always get my labs done by Quest Diagnostics. Going back through my lab tests I noticed that they vary somewhat. Sometimes my testosterone test has been TESTOSTERONE,FR(DIALYSIS) AND TOTAL(LC/MS/MS) while other times it was TESTOSTERONE FREE AND TOTAL BY ED/TMS - ADULT MALE. For E2 it just says ESTRADIOL but then I see there is a note below it that says this, making me think this was the wrong test:
For any patients for whom low Estradiol levels are anticipated (e.g. males, pre-pubertal children and hypogonadal/post-menopausal females), the Quest Diagnostics Nichols Institute Estradiol, Ultrasensitive, LCMSMS assay is recommended (order code 30289).
There isn’t much information available on what the differences are between those tests. I found a post from back in 2011 that discussed in details the differences between tests but the names were a little different so I assume these are newer tests.