Yes. To submit all Medicare claims at the same time:
Click Reports > Finance.
Click New Report at the top-right of the page.
From the Report Type drop-down menu, select Unprocessed Medicare.
Set any other filters you require. For daily processing, enter "1" in the Appointment Age field.
Click the blue "Process all" link in the top-right corner to send all the listed claims to Medicare/DVA (alternatively, you can tick particular invoices and click the "Process Selected" link in the bottom-left corner of the page).