What is a Developmental Disability? "Developmental Disability" means: A severe, chronic disability of an individual that: • Is attributable to an intellectual or physical impairment or combination of intellectual and physical impairments. • Is manifested before the individual reaches age 22. • Is likely to continue indefinitely. • Results in substantial functional limitations in three (3) or more of the following areas of major life activity: • Self-care. • Receptive and expressive language. • Learning. • Mobility. • Self-direction. • Capacity for independent living. • Economic self-sufficiency. Is not attributed solely to mental illness.