Disability harassment is unwelcome conduct based on a student’s actual or perceived disability. Harassers can be students, school staff, or even someone visiting the school, such as a student or employee from another school. Disability harassment can take many forms, including slurs, taunts, stereotypes, or name-calling, as well as disability-motivated physical threats, attacks, or other hateful conduct.

In addition, at the elementary and secondary school level, bullying or harassment of a student with a disability on any basis can result in the denial of FAPE that must be remedied under Section 504.

From Here.