If you stay in Korea more than six months, you are mandatorily subscribed to the National Health Insurance of Korea from Feb 28, 2021.
You will be required to make a monthly payment of about 62,000 Korean won.
Please refer to the following websites for the further information.
https://www.nhis.or.kr/english/index.do
https://www.nhis.or.kr/nhis/policy/wbhada02410m01.do
Facebook