Lets see, the first time I saw a doctor (she was a GP, staff physician) was at the health clinic at my school. She discussed with me what I had been taking, what kind of physical and mental effects I'd seen, what kind of dosage I had tried and was comfortable with, and what my desires/intentions were. All in all, she very much worked with me on figuring out what would best suit my situation. She had some blood taken for testing (renal and lipid panel, testosterone, cholesterol, potassium, and some others, two sizable vials altogether), and I walked out that day with some prescriptions. I had expected some sort of physical exam actually, but she never mentioned it.
It was a wonderful experience, really. It kind of made me wish I had looked or tried sooner.