Colleges don't know whether a student applicant has an IEP or a 504 plan . ... In fact, colleges aren't allowed to ever students who apply whether they have a disability. Nor can a college ask what kind of plan a student has, because that's simply a different way of asking if the student has a disability.
Section 504 defines an “individual with a disability” broadly as “Any person who (1) has a physical or mental impairment which substantially limits one or more of such person's major life activities; (2) has a record of such an impairment; or (3) is regarded as having such an impairment.” What does this mean? https://mcandrewslaw.com/publications-and-presentations/articles/does-my-child-qualify-for-a-504-plan/
Is a medical diagnosis required for a 504 plan?
Section 504 requires a child to have an evaluation before receiving a 504 Plan. ... Decisions about who qualifies for Section 504 cannot be based solely on a single source of data (i.e. a doctor's diagnosis or grades). A medical diagnosis is NOT required under Section 504. https://chadd.org/for-parents/section-504/
Should you tell college about ADHD?
The decision whether to disclose your ADHD during the admissions process is yours to make. Disclosing one's disability and how it may have had an impact on the student's grades or coursework might allow admissions counselors to view less competitive information differently once they understand the impact of ADHD. https://chadd.org/for-parents/disclosing-adhd-during-admissions/