Medical is a special field. It require some special certificate for active, so it is very difficult for your project to get certificate from some organization for active. But, it have to change too, and block chain is one of the revolution for it.
Well you are right that certification for medical using blockchain is really hard to obtain but Atlantico network will sign a contract with their partners to connect their platform to medical centers around the world and as you can see that the team members are experts in medical industry so they know what to do for the successful of this platform.
And ofcourse AtlantICO will have a list of those professionals on there platform and they are the one who will recommend them to all of us and I hope they will put rating there on each profile of doctors or medical staff that will be in the platform so anyone can post ofcourse their experience or recommendation. Goodluck AtlantICO Network team hope for the best and success of your project.