Part C eligibility is determined by each state's definition of developmental delay and includes children with established physical or mental conditions with a high probability of resulting in developmental delay and includes conditions such as chromosomal abnormalities; genetic or congenital disorders; sensory impairments; inborn errors of metabolism; disorders reflecting disturbance of the development of the nervous system; congenital infections; severe attachment disorders; and disorders secondary to exposure to toxic substances, including fetal alcohol syndrome. States may choose to include children at risk for disabilities in the eligible group (§303.21). An important part of the evaluation process for infants and toddlers includes informed clinical opinion of professionals experienced with development in the very young.
Part C of IDEA Child Count Data Tables: Part C Child Count data is one measure that can assist states in determining performance related to early identification and provision of services to children with disabilities. Part C Child Count data is available for several fiscal years and reports reflect the number of Part C children served.
Colorado's Database of Established Conditions - Children with an established physical or mental condition with a high probability of resulting in developmental delay are eligible for Part C. States include established conditions in their eligibility policies. While many mirror the language in the law, some states provide lists of conditions as guidance. Colorado, for example, works with a panel of physicians to maintain a database of physical or mental conditions that have a high probability of resulting in a significant level of developmental delay.