If I remember correctly this was tried in Europe ages ago, liability concerns made it impractical in US.
Plus--wouldn't the software company be liable? (I don't think the tech is ready for office use, but when it is--I still think it will be a battle.)
Kinda like all medical devices. Whenever there's a problem, the equipment is looked at first?
Personally, I don't think the AMA wants computers taking away their doctor's precious income, and will only acquiesce when the tech makes the doctor more money, or is so good politicians/insurance companies start demanding it.
But IMHO medical law in general has a big device / software blind spot. It's become decent at figuring out liability for humans, while permitting normal operations.
But all that machinery and case law doesn't really exist for black box software systems (no human in the loop). And if there's one thing that medical providers and insurance companies hate, it's unbounded liability.