After the initial medical work up (eyes/ears/blood), they do a full flight physical on all aviation candidates. It’s highly recommended that you bring copies of all medical paperwork bc they will probably need it. If all goes well and you had very few/no medical problems, they’ll submit it to NAMI for review. For some people, they’ll need a referral to a specialist if you had some sort of condition in your past (broken bones, back problems, behavioral, etc.); once that’s done, they’ll ship it off to NAMI.
If you’re curious about your medical clearance at that point, just remember that no news is good news