I'm not really sure what Historie has to do with the business/law/medical genres, but here goes for some suggestions:
1) Otoyomegatari. Historical manga. Incorporates elements of business/law-more so, I think, than Historie does-but, those aren't its primary foci. Otoyomegatari is aka "A Bride's Story", and it is set in 19th century Asia. I wouldn't have mentioned it all if you hadn't listed Historie.
2) Doctor Du Ming. Medical/psychological manga. Due to its nature, it's hard to give an accurate blurb without giving things away. Most blurbs you'll find by googling are a bit misleading for this very reason, I think. Main character is an anesthesiologist. It's also fairly dark, in case that is or isn't your thing.
3) Ray the Animation. This anime has a loose connection to Black Jack, in that Black Jack is the doctor who "rescued" her and gave her her new eyes. Similar to Black Jack in being a medical anime/manga. Ray is a surgeon who's new eyes have X-ray like vision. As you can imagine, episodes tend to focus on how she solves bizarre medical issues through the use of her eyes.
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