I recommend Kim Jeong-cheol Oriental Medical Clinic located in Jung-gu, Daejeon.

This is a Korean medicine clinic near my parents' house. I've been going here since I was a child, when I was a complete novice. I believe this clinic has been around for a long time and has a lot of experience. They can treat anything, from back pain and neck pain to herbal medicine. There used to be only one person doing the treatment, but when I went recently, there were two. One of them graduated from Wonkwang University School of Medicine, Masters, and Doctorate, and the other graduated from Daejeon University School of Medicine. They have impressive credentials, right? ^^