In my opinion first one has to decide about area of specialization or field of research. Once it is done look about funding and the budget. If you have children think for their schools and education there. Looking to all these will proceed to you for successful and optimized selection of universities.
You can also search for some of the MSc and PhD options in Health Informatics offered across the world via the gradschool.com database. Check attached link http://www.gradschools.com/programs/health-informatics