I recommend Choi Jeong-hwa Pediatrics in Yongho-dong, Nam-gu, Busan.

This is Choi Jeong-hwa Pediatrics and Adolescent Clinic, located in Yongho-dong, Nam-gu, Busan. When I lived in Busan, my nephews and nieces would always go here when they were sick. They're all grown now and no longer need to go to a pediatrician, but when my children and my siblings' children need to go to the hospital in Busan, they still come here. The female director is meticulous and attentive, and she's been here for over 20 years. I think every child who's ever lived in this neighborhood has probably been to this clinic. These days, with pediatric clinics becoming increasingly scarce, it's always a blessing to have a clinic that's still around.