I recommend Seongnam District Seongsu-dong Seongsu Yonsei ENT Clinic.

I recommend Seongdong-gu Seongsu-dong Seongsu Yonsei ENT Clinic. It is about a 1-minute walk from Seongsu Station, so accessibility is very good. The director is also kind, and the atmosphere is pleasant. They also provide medical services on Saturdays, so you can visit and receive treatment if you schedule accordingly. The clinic hours are kindly displayed in front of the hospital for your reference. The hospital is located on the second floor.