Dr. Steinman is pretty much a cakewalk if you're on the easier difficulties but if it's getting too tough, here are some tips.
Bring a security bot with you. When you first enter the Surgery foyer, he sends one to kill you. You can Electo Bolt that one and hack it and bring it with you. It can help damage Steinman but more importantly it will be a distraction, allowing you to attack whatever way you want.
Use your Electro Bolt and Incinerate. You can electrocute him and give him a few good shotgun shots to the face while he is stunned or it's useful if he attempts to go to the lower level which is flooded. There is also oil that you can light on fire if you can get him coerced into standing in it.
Also you can either hack or destroy the aid station so he can't use it anymore.
Just some quick tips if you're having any trouble.