There are two children's hospitals in Beijing. The corresponding medical insurance codes are as follows. You can choose the one you need:

1, Beijing Children's Hospital affiliated to Capital Medical University (Beijing Institute of Pediatrics)

Address: No.56 Nanlishi Road, Xicheng District, Beijing

Medical insurance code: 02 159043

2. Children's Hospital Affiliated to Capital Institute of Pediatrics

Address: No.2 Yabao Road, Chaoyang District, Beijing (General Hospital), or No.1 Yuetan South Street 1, Xicheng District, Beijing (Yuetan Branch)

Medical insurance code: 05 1 10095

Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.