Doctor, Physician
noun
Someone who works in medicine is a doctor.
いしゃ
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
今日は医者に行かなくちゃいけない。
I have to go see a doctor today.
私の医者としてのミッションは人々を元気にすることです。
As a physician my mission is to make people healthy.
私は血を見るのがきらいですが、医者にはなれますか?
I don't like seeing blood, but can I still be a doctor?