You should submit your medical form I-693 at the time of filing your AOS application. Your medical form is valid for 2 years and if you don't submit this at the time of filing it will generate a request for evidence (RFE) as soon as the review starts.
USAPath users, we automatically fill out your I-693 along with steps to get it ready for concurrent filing to expedite your approval!
FAQ's:
But I have heard that I should wait until RFE to help my application keep moving, is this not true?
No, there is absolutely no evidence of this being beneficial. In fact the only thing guaranteed with this approach is that you will definitely not be approved without an RFE.
I received a RFE for my medical, does this mean I am about to be approved?
No. This simply means that an initial review of the packet exposes the deficiency and your case is on hold until you send the documents in to complete your file.