Software as a Service (SaaS) - Offers a complete software solution that you purchase on a pay-as-you-go basis from a cloud service provider. The provider manages the infrastructure, middleware, app software, and app data, with the app being accessible to all users via the internet.

Platform as a Service (PaaS) - Provides an environment for developing, testing, delivering, and managing software applications. It is designed to make it easier for developers to quickly create web or mobile apps without worrying about setting up or managing the underlying infrastructure.

Infrastructure as a Service (IaaS) - Offers compute, storage, and networking resources on demand, on a pay-as-you-go basis. It requires the most management from the user, including managing applications, data, runtime, middleware, and the OS.

None of the above - The healthcare provider should consider other options not listed here.