So it seems to me at least that they real challenge to solve is how to get the data into to the systems rather than the actual systems themselves.
That's easy. Simply link the reporting system and payment system. In the US, doctors pick a super-specific set of diagnoses for each patient visit, and then send the insurance companies supporting data to ensure they get paid. There's your data.
Some years ago I did a project for an affiliate to the Danish health department.
I was working on an interface that would allow for better tracking and thus early warning of a flu epidemic. This was done through doctors reporting when ever they had a patient.
It turned out that the real bottleneck was to get the doctors to report. There simply wasn't the right incentive.
I have also had other experiences within this field which made me realize just how hard a problem the human factor is.
So it seems to me at least that they real challenge to solve is how to get the data into to the systems rather than the actual systems themselves.
At least in Denmark (and we are pretty progressive when it comes to tech) this is a huge problem.