The No Surprises Act stipulates that GFEs are sent according to a strict schedule:
If the appointment or service is scheduled three to nine business days in advance, send the GFE within one business day after the date of scheduling.
If the appointment or service is scheduled at least 10 business days in advance, send the GFE within three business days after the date of scheduling.
If a GFE is requested for a nonscheduled appointment or service, send the GFE within three business days after the date of request.