No, not necessarily. Colleges generally will not know whether a student has an IEP or a 504 plan. In fact, colleges cannot even ask students whether they have a disability or not (and thus cannot ask whether a student has an IEP or a 504). Students, however, can choose to disclose this information themselves. Despite this, there is no data on how many students who disclose their disabilities to universities are admitted to colleges. Do not worry that having either an IEP or 504 plan will somehow influence your college admissions chances - it won’t!