Yep enforcing monopoly pricing and preferential pricing as written in already existing law would go a long way. Posted up front prices that are visible to everyone further drives the cost down.

Surgery Center of Oklahoma is already doing this.

There are also Dr.s looking at a new model for providing healthcare discussed in this video.
https://www.youtube.com/watch?v=ZucL8JKrvfo  

1 hour 13 minutes long but well worth your time.

Key point he makes: they take a oath to do no harm which also includes no financial harm around 5:55 into the clip.