When a provider is added in the setup, there is an option that is allowing the restriction to double-book the provider.
When the “Default Provider Time” in the provider’s setup is indicated as “Yes,” the provider’s appointments will automatically record a slash (/) in the appointment’s time intervals. The slash indicates the provider should not be double-booked.
If a provider is setup to allow appointments in multiple operatories, it is recommended that the field indicates “No” so that double-booking is allowed.
Setup / Providers / Providers Setup