Other Health Impairment (OHI) — What IDEA and Section 504 Mean for Schools and Families Other Health Impairment (OHI) is an IDEA eligibility category that covers chronic or acute health conditions that limit a student’s strength, vitality, or alertness and adversely affect educational performance.  Section 504 provides parallel civil‑rights protections for students whose health conditions substantially limit one or more major life activities .  This article explains how students qualify for OHI, the referral and evaluation process, common assessments, evidence‑based services, accommodations and modifications, progress monitoring, and parents’ rights. Legal Framework and Definition IDEA (OHI): A student may be eligible under OHI if they have “limited strength, vitality or alertness, including a heightened alertness to environmental stimuli, that results in limited alertness with respect to the educational environment” due to chronic or acute health problems (examples: ADHD , ...