"I went to the doctor yesterday."
I agree with JW, いしゃさん or おいしゃさん seems more natural.
Also, no は after きのう here, but we got dinged for leaving it out in a previous quiz.
The dictionary that I use lists 医者 as a "sensitive" word. Is this because a physician may be offended by someone not using proper respect with the title?
How is 医者 supposed to tell me that doctor is いしゃ?? When did Duolingo teach me those kanji?
Stupid, useless hints sometimes. Not even hints, really, if we've never been taught the vocabulary before.
Does Japanese distinguish physician from PhD, the way German does?