I recommend Jamsil Samsung Kids Pediatric and Adolescent Clinic.

The male and female directors and nurses at Samsung Kids Pediatrics and Adolescent Clinic in Jamsil are all very kind. They provide detailed explanations and meticulously examine each child's condition, putting children at ease. Because they are so kind and attentive, many parents come to this clinic for vaccinations. In short, it's a trustworthy hospital. It's always crowded, and there's a reason it's so popular.