Send an SMS to any phone number. Oystehr's Transactional SMS feature makes it easy to send a text message to your Users with a single API call. You can use this feature to send appointment reminders, prescription refill reminders, discharge information, and more.

Access Policy Requirements:
Action: Messaging:SendTransactionalSMS
Access Policy Resource: Messaging:TransactionalSMS
Action: FHIR:Create
Access Policy Resource: FHIR:Communication
Action: FHIR:Update
Access Policy Resource: FHIR:Communication

You also need Read access for the resource to which you are sending a message. For example:
Action: FHIR:Read
Access Policy Resource: FHIR:Patient