1111: Magistra Hersend
Surgeon for Louis IX During the Seventh Crusade in 1249
Birth and Death Dates Unknown (As are Locations)
Magistra is one of two women ever recorded as a royal physician or surgeon in French history.
Magistra reportedly also cared for the queen and other female camp followers throughout the crusade. After the crusade finished, Magistra married the apothecary and earned a pension from the king.
Unfortunately, the only sources readily available for her online are either Wikipedia, or other websites whose sole source is the aforementioned Wikipedia article, so take this information with a grain of salt. I also managed to find a small publication magazine that lists Magistra in one of their timeline entries, but the magazine fails to list any sources for the information that I can see.