This is how I figured out my number as well... as I dug out my AAMC number from old emails from several years ago. Even if one didn't apply MD, I presume that you could find your AAMC number from your MCAT registration emails (someone correct me if I am mistaken). Does anyone know if their Careers in Medicine profile that the schools gave us as MS2/MS3 students are linked to our AAMC ID?... if so, that might be another thing to look into, if you can find those emails. I don't entirely remember now, but these are just suggestions.It should be the same number given to you when you took the MCAT (and filled out amcas if you applied to any MD programs).