Wikipedia
Jang-geum
Jang Geum (fl. early 16th century; family name Seo) was reputedly the first female Royal Physician in Korean history. She was mentioned more than seven times in the Annals of the Joseon Dynasty. It is known that King Jungjong was pleased with Jang Geum's medical knowledge and trusted her with taking care of royal family members. Henceforth, Jang Geum became the third highest-ranking officer in the Court, and was granted the use of ''Dae '' (which means "great" in Korean) before her first name.
Some sources attest to Jang Geum as a real person and it is still a topic of debate among scholars.