The biggest EMR company was Epic and uses Mumps [0]. However, they are losing share to Center and others [1], so this formula will only work for a little while longer.
If you have ever worked with epic, they offer "managed" solutions, which you either do the epic designed way, or don't go epic... They have enough market share and business to dictate how things will work in a hospital env
They have deployments slotted for 3 years.
If you have ever worked with epic, they offer "managed" solutions, which you either do the epic designed way, or don't go epic... They have enough market share and business to dictate how things will work in a hospital env