Koudou ni Hattatsu Shita Igaku wa Mahou to Kubetsu ga Tsukanai is a Manga/Manhwa/Manhua in (English/Raw) language, REINCARNATION series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Realistic take on a modern doctor in another world treating fantasy creatures without magic or modern equipment