1) MFDS (Korea FDA) English website : https://www.mfds.go.kr/eng/index.do

    Korean website : https://udiportal.mfds.go.kr/

2) English Medical Device Act : https://www.law.go.kr/LSW/eng/engMain.do

3) National Institute of Medical Device Safety Information 
  - Mostly Class I, II registration authority (Class III, IV is under MFDS).
  https://www.nids.or.kr/

4) Medical Device GMP audit institute website
  - KTL : https://www.ktl.re.kr/main.do

  - KTR : https://www.ktr.or.kr/

  - KCL : https://www.kcl.re.kr/site/main/index001

  - KTC : http://www.ktc.re.kr/web_united/