Under the Individuals with Disabilities Education Act (IDEA), if a student who has not been identified as requiring an Individualized Education Program (IEP) is facing removal from the regular educational setting - i.e., expulsion or an extended suspension - but a parent nevertheless believes the student may have a disability, the parent may request a special education evaluation. This is a situation that occasionally will arise.
In special education law, there occasionally is some confusion among parents as to what it means to be a child with a disability. An important thing to understand is that the definiction is quite broad.
Unfortunately, bullying at school is a problem that parents and students deal with far too often these days. Parents whose children have been bullied at school are well-advised to deal with the problem as soon as it comes up. Otherwise, it will not be seriously or adequately addressed.