In research on the history of medicine, less attention is paid to the subject of historical geography. Considering the importance of this subject in the history of science, this paper discusses one of the most important science centers in the world. This outstanding medical research center was located in Gorganch city, Chorasmia area, in the Eastern part of the Islamic. Chorasmia medical school was one of the important Iranian medical schools before the Mongols’ attack. Its history (305-1231 A.D.) can be divided into three eras; Ale Iraq, Ale Ma'mun, and era of the Khwarazmian dynasty. This geographical area in the Northeast of Iran has escaped the notice of researchers in recent studies. The presence of great Persian physicians and scientists throughout history in this area indicates its scientific importance. The present article focuses on Chorasmia Medical School since its establishment until the Mongols’ attack.

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