Depending on your billing integration, some fields in the superbill will populate based on Practice or Encounter information.
The default values for the superbill are:
Facility: The Seen at Facility will default to the facility you are logged into.
Billing provider: The Billing provider will default to whomever the Seen By provider is on the Encounter.
Rendering provider: The default for Rendering provider will populate based on the Seen By provider in the Encounter. Note: If the Seen By provider is altered after the superbill is created, the change will not be reflected in the superbill