No. You cannot do upfront medicals anymore under the new application.
Once you get AOR you will get the subsequent requests for Police Check, Schedule A and Medical Request. The medical request will have attached special documentation from CIC to bring to the panel approved physician. The panel approved physician will send your medical results along with this paperwork once you've done the exam, 30 days within the day they originally request.
I understand why you wanted to plan ahead, but I would NOT deviate from this process. It could cause delays and problems with your application.
Good luck!