Jang Geum (fl. early 16th century; family name unknown) was reputedly the only female Royal Physician in Korean history. She was mentioned about seven times in the Annals of the Joseon Dynasty, albeit with very vague and sketchy details. It is known, however, 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.
Despite sources that attest to Jang Geum as a real person, it is still a topic of debate among scholars.
It is worth noting that Jang Geum is still, to this day, the only female physician of a Korean head of state or government.
Read more about Jang Geum: Mentions in Annals of The Joseon Dynasty, Mention in Other Medical Annals, Portrayal in Television