I understand you, hear a lot lately about this kind of applications. I heard that the Xamarin platform is developing. Mobile app is a great idea. Such mobile apps connect doctor with patient, and make their communication quick and effective. People who value their time and money have already downloaded their healthcare mobile apps and use them actively.
https://headworks.io/blog/12-benefits-o ... evelopment These guys are engaged in the development of such platforms, refer to them.