I recommend Kim Young-dal Oriental Medical Clinic in Bukgajwa-dong for general treatment.

This is the neighborhood Korean medicine clinic in Bukgajwa-dong.

It's nothing special, but it's convenient because they offer night care until 9 p.m. They also offer moxibustion and acupuncture, and the acupuncture is particularly good. It's a bit scary to get acupuncture done just anywhere. You can't trust them 100%, but they have a lot of experience, so it's generally okay. And the other treatments are also pretty good. I always buy and take herbal digestive aids. I highly recommend them.