I don't mean to sound facetious, but do you really need to tell the Endo what he needs to be testing for?  And shouldn't your Endo be informing you about what time the blood work needs to be done - before or after meds, morning or afternoon???   It sounds like you don't have much confidence in your Endo and maybe should look at changing if that is the case.

I believe that the blood work needs to be done in the morning.  We have ours done before 9 am and after 7 am meds.  However, I have seen other messages on the board where they have theirs done before 8 am, and some within a certain time after the morning meds.  It really is a question to ask the Endo and seek an explanation for.  If you are not happy with the answer, as I said earlier, you may have to look at changing Endo.