When creating invoices from master file, could you remove the current setting to set MRP physician or the first physician who billed this patient to be set automatically as a "default physician" but instead leave the physician "blank" or set the physician on the date of service on schedule as "default" physician?

MOA create the uninsured invoices from master file and the physician on the schedule is usually not the same as MRP or first physician (under walk-in environment).