Ok everyone. This type of question seems to come up periodically, yet nobody has ever properly addressed it. I will start off by saying that i am currently an MSII at a US allopathic medical school and I sit on the admissions committee at my school. My freshman year of college i did something very stupid and was placed on both housing and disciplinary probation at my university. I was very worried about this during the application cycle, but i consulted a friend who was already in med school and he advised me that it would be okay. So, i did not check the box on AMCAS indicating institutional action, did not mention it in any of my interviews and was subsequently accepted to four medical schools, including my top choice.
Here is the real information that i am hoping to offer you. When i was applying, i was only going off of the advice of a friend, but now that i am on the inside, i know how it actually works. All disciplinary action taken against a student is private and is protected by the Family Educational Rights and Privacy Act. The school can release absolutely no information about you without your consent. This includes absolutely no disciplinary or academic information. As a student admissions officer, i have seen that a very small number of schools will include academic violations on their copy of the official transcript. These schools will ask you to sign a release before the transcript is submitted. To verify that your school is not one of these, request a copy of your official transcript and verify that nothing is on it. The only other way that i have seen people get caught is in their pre-med committee letter. Some schools ask a student for letters of rec and then the premed committee reviews the letters, interviews the student and then reviews the students disciplinary file. If there is anything in your disciplinary file, the premed committee will ask you to sign a release and they will mention it in your letter. Find out if your school does this. If they do, use interfolio as a letter collection service instead. My school does not care whether your letters come from the premed committee or from a letter collection service. So in summary, there are only three ways that you can be caught, on your transcript, on your LORs or in your interview. Keep your mouth shut and you will be fine. You already screwed up once to put yourself into this predicament, don't screw up again.
I have heard many people wonder if schools run "background checks" on applicants/admitted students. My university does not. As far as i know, there are no universities that do. However, there is a criminal background check at my university before we take step 1. Unlike law schools which request a copy of the university disciplinary record, medical schools do not ask for a confirmation. The only people who they ask for a confirmation from is people who checked the institutional action box and they want to verify their story.
Now, getting to the checking of the institutional action box. Absolutely, under no circumstances check this box. At my school all checked applications are put in a separate pile for special review by an admissions officer. Of the 100+ checked applications this year, 1 has been admitted so far. This person was only admitted because they had checked the box for a write-up concerning over-occupancy in her dorm room freshman year. Checking the box is a huge red flag and will almost guarantee you a rejection.
In summary, the reporting of institutional action is something that will keep you out of medical school. Do i feel bad about not checking the box? Absolutely not. I know that what happened almost 6 years ago does not reflect on me as a person and that i have grown as an individual thanks to that experience. Am i worried about being caught in the future? Absolutely not. All undergrad schools have a policy whereby they destroy student disciplinary/housing records the day the student graduates. So, I know that as long as i keep my mouth shut, that nothing will come of it and i will go on to be a great doctor and help many people.
I hope that this post has helped some people who are now in the same position that i was once in. Good luck with your applications.