IDEA Disability Categories in Missouri
What disability categories qualify for an IEP in Missouri?
Missouri recognizes 14 disability categories for special education eligibility, consistent with the 13 federal IDEA categories plus the state-added category of 'Young Child with a Developmental Delay' (YCDD). The categories are: Autism, Deaf-Blindness, Emotional Disturbance, Hearing Impairment (including Deafness), Intellectual Disability, Multiple Disabilities, Orthopedic Impairment, Other Health Impairment, Specific Learning Disability, Speech or Language Impairment, Traumatic Brain Injury, Visual Impairment (including Blindness), and Young Child with a Developmental Delay. Missouri uses the federal term 'Emotional Disturbance' (not a state-specific variant). YCDD applies to children ages 3 through 5 (kindergarten age eligible or younger) who show developmental delays in physical, cognitive, communication, social/emotional, or adaptive development. A child identified as YCDD may continue that classification through kindergarten but cannot maintain it once entering age 7 before August 1 — the child must be reevaluated under other disability categories. Missouri uses numerical codes for eligibility categories in its compliance standards (e.g., Standard 600 for Autism through Standard 2100 for YCDD). For Specific Learning Disability, Missouri permits both the severe discrepancy model and a response-to-intervention (RtI) process, and does not require use of the discrepancy model.
What Missouri Requires
Missouri recognizes 14 disability categories: the 13 federal IDEA categories plus Young Child with a Developmental Delay (YCDD) for children ages 3–5 (Missouri State Plan, Regulation III; 34 CFR 300.8).
Missouri uses the federal term 'Emotional Disturbance' — not a state-specific variant. The definition includes schizophrenia but excludes social maladjustment unless it constitutes an emotional disturbance (Missouri DESE compliance standards; 34 CFR 300.8(c)(4)).
Young Child with a Developmental Delay (YCDD) is for children ages 3–5 experiencing developmental delays of at least 1.5 SD below the mean in two areas or 2.0 SD below in one area of physical, cognitive, communication, social/emotional, or adaptive development (Missouri State Plan, Regulation III).
YCDD classification cannot be used for a student who is age 7 before August 1 of a given school year; the child must be reevaluated under other disability categories (Missouri State Plan, Regulation III; RSMo 162.700).
For Specific Learning Disability identification, Missouri permits both severe discrepancy (at least 1.5 SD) and response-to-intervention (RtI) approaches; Missouri does not require the discrepancy model (Missouri State Plan, Regulation III).
Eligibility determination requires a multidisciplinary evaluation; no single measure may be the sole criterion for determining eligibility (34 CFR 300.304(b)).
Key Timelines
Initial evaluation must be completed within 60 calendar days of parental consent (Missouri State Plan, Regulation III; 34 CFR 300.301(c)).
YCDD classification expires upon entry into age 7 before August 1; reevaluation under another category must occur before that transition (Missouri State Plan, Regulation III).
Triennial reevaluation must occur at least every three years (34 CFR 300.303).