I recommend Munhwa-dong Hospital!

This is the hospital I've been going to since I was little, whenever I was suddenly sick. They treat a variety of conditions, including internal medicine and dermatology. It used to be located in what was once called the Pureun Nursing Hospital, but they've since expanded and relocated. Well, it's been around for a while. I guess I shouldn't have to worry about their skills, right? Haha.