Software as a Service (SaaS) is the most suitable cloud service type for this scenario because it provides a complete software solution that is managed by the service provider, requiring minimal management and maintenance from the healthcare provider. SaaS applications are accessible over the internet, making them easily accessible to all healthcare professionals. Additionally, SaaS providers typically ensure their services comply with industry-specific regulations like HIPAA, addressing the compliance requirement. The scalability of SaaS solutions allows the healthcare provider to easily accommodate varying numbers of users without worrying about underlying infrastructure management.