Some problems that I think are fixable are doctors overcharging patients by over analyzing and diagnosing, in order to hike up costs due to the fee-for-services. Patience over consuming because they can, while not being able to afford it; and lawsuits bringing up healthcare costs. Overall the fixable problems are the costs.

Problems that are not fixable is the affordable care act, this ridiculous thing that is going to cause more pain than good, another thing is the new technology being so expensive, there will always be new technological advances, which is a good thing, but unfortunately that will always come with a high price.

Now to fix these problems, I think for one, Doctors should be paid on a salary basis. It can be calculated with their Human capital in mind to reflect their expertise, but this will bring down the fee-for-service cost, since they like to take advantage of that.
Second the patience healthcare consumption should have a limit, based on their health and affordability, unless of life threatening emergencies.
Lawsuits are a big part of healthcare costs, and there should be stricter caps in place, that insurance companies deal with, not the physician. There should also be strict rules put in place that the physician will lose his license if he has lawsuits against him, like a 3 strikes you're out, so they can't just pay it off.
I think instead of the obamacare, where people are required to pay for insurance, employees should be Required to take advantage of the health savings accounts. It is tax free, and can help people pay for routine visits in order to avoid health problems down the road. It makes more sense for this to be mandated than actual health care. I think fixing these problems will help reduce the growth of health care costs and increase the efficiency of the health care