As long as you have the "golden ticket" from your therapist you're basically good to go. My endo appointment was mainly talking to the doctor about what method I wanted to do (gel,patch,injection), discussion about dose, she made sure I knew how to do the shot/where to do it, she talked to me about a few things to expect, wrote me the Rx, and sent me on my way. (I can't start my shots till after surgery next month...I have the vial but avoided buying syringes. Too much temptation)
I have my blood work done at a Hospital I frequent a few months back so my endo just used that. I'll have blood work at the Hospital again 3 months after surgery (that will also be 3 months on T), and after that I'll be paying out of pocket with no insurance. I haven't checked with the billing department but my endo said the test can be anywhere from $200 to $400.
Oh, and in case you're wondering the vial of T (10mL) was $96 without insurance but will last a good while.