The answer is not straight forward and requires several caveats to fulfill HIPAA regulations.
The list below provides specifics. When applicable they all require a BAA (Business Associate Agreement) signed by the user and the provider.
The HIPAA industry is vast so we can empathize with just how many people need to use cloud-based services in this sector.
Can I use Cloud based storage and be HIPAA Compliant? - Paubox